on resuming high—level military communication and slowing the production of fentanyl, a synthetic opioid responsible for tens of thousands of drug overdose deaths in the us. however, the leaders are still at odds over taiwan, with president xi calling it the "biggest and most dangerous issue" in bilateral ties. beijing considers it part of its territory while the us maintains unofficial relations with taiwan as a democratically self—governed island. here's what president biden told leaders about the us—china relationship on thursday. our discussions will always be candid and constructive. states does not seek conflict. we announced military to military communication to reduce the risk of accidental miscalculation. joining us now from san francisco is sumi somaskanda. sumi, you've been there covering this apec summit all week. what's the latest there? on the very last full day of the summit, you might hear the rain coming down, people wrapping up their meetings, some meetings on friday as well, but we saw a lot of bilateral meetings today, and a focus on the indo—pacific. president biden earlier speaking to apec leaders and working with the indo—pacific leaders. we saw them on the stage announcing part of the indo—pacific economic framework. they announced small agreements on things like supply chains and working together on climate change. it's important to know that coming into the summit, the biden administration had hoped to announce a larger framework involving trade agreements, which was derailed by democrats in the us who were worried that that type of agreement might strip away protections from us workers. that is important because the biden administration want to underline how important the indo—pacific region is for regional and national security. we saw president biden speaking with the leaders of indonesia, japan, south korea. we saw the secretary of state antony blinken doing the same. at the end of the day, they were able to announced small agreements with these leaders. they have said they will look to recalibrate next year and deepen those relationships further, as a counterweight to china. �* , , ., china. it's been an eventful week of diplomacy - china. it's been an eventful| week of diplomacy between china. it's been an eventful- week of diplomacy between the us and china specifically, and i understand you sat down to discuss it all with one member of the biden administration? that's right, this really has been an all government approach, several members of the biden administration cabinet here working with chinese counterparts, the commerce secretary, the secretary of state, and also the us special climate envoy, john kerry, an important part of negotiations as well. i sat down with him earlier to talk about his role in this negotiations and one of the agreement is reached, on climate change. thank you so much forjoining us, i will ask you about the climate agreement in a moment, but first you are at the table with president biden and president xi on wednesday, do you think it was a reset of us china talks? i you think it was a reset of us china talks?— you think it was a reset of us china talks? i think president biden wants _ china talks? i think president biden wants that _ china talks? i think president biden wants that to - china talks? i think president biden wants that to happen, | china talks? i think president l biden wants that to happen, he is very— biden wants that to happen, he is very pleased with the way the conversation went. those of us who — the conversation went. those of us who were there thought it was — us who were there thought it was a — us who were there thought it was a real move into a new moment, _ was a real move into a new moment, where people are ready to talk_ moment, where people are ready to talk seriously, be candid, but to— to talk seriously, be candid, but to understand the value of bringing — but to understand the value of bringing the united states and china — bringing the united states and china closer into co—operation on any— china closer into co—operation on any number of things, but particularly the co—operation that— particularly the co—operation that came out of military to military— that came out of military to military and sentinel, but from my point— military and sentinel, but from my point of view on the climate issue. — my point of view on the climate issue. i— my point of view on the climate issue, i think it was a huge step— issue, i think it was a huge step forward. —— and fentanyl. we are — step forward. —— and fentanyl. we are very— step forward. —— and fentanyl. we are very positive about china _ we are very positive about china deciding to agree to take steps. — china deciding to agree to take steps, and we have to take steps. _ steps, and we have to take steps, everybody is going to work — steps, everybody is going to work in _ steps, everybody is going to work in the same direction, that's— work in the same direction, that's really important. the climate agreement - that's really important. tie: climate agreement says both countries will pursue efforts to cripple renewable energy capacity globally by 2030. how will that be measured? —— two triple renewable energy capacity globally. i triple renewable energy capacity globally. i think it's reall a capacity globally. i think it's really a very _ capacity globally. i think it's really a very important - capacity globally. i think it's really a very important part| capacity globally. i think it's l really a very important part of this agreement. that deployment of renewables is going to be criticai— of renewables is going to be critical to being able to peak eariier— critical to being able to peak earlier irr— critical to being able to peak earlier in china, actually peak emissions _ earlier in china, actually peak emissions earlier and begin to reduce — emissions earlier and begin to reduce. and china did agree that— reduce. and china did agree that they— reduce. and china did agree that they would deploy in a way that they would deploy in a way that tried — that they would deploy in a way that tried to make it possible to know _ that tried to make it possible to know that you are going to -et to know that you are going to get those reductions, and that begins — get those reductions, and that begins to— get those reductions, and that begins to really show progress that helps us with the c 0 p —— cop. _ that helps us with the c 0 p —— cop. and — that helps us with the c 0 p —— cop, and opened the door for other— cop, and opened the door for other people to step in and be part of— other people to step in and be part of it _ other people to step in and be art of it. other people to step in and be part of it— part of it. even if there are no enforcement _ part of it. even if there are - no enforcement mechanisms? the nature of multilateral negotiating, which brought us the paris _ negotiating, which brought us the paris agreement and subsequent efforts, doesn't tend — subsequent efforts, doesn't lend itself easily or well to global— lend itself easily or well to global enforcement. countries don't — global enforcement. countries don't like that, they don't want _ don't like that, they don't want that. what you have here is your— want that. what you have here is your word. and the scrutiny of the — is your word. and the scrutiny of the rest _ is your word. and the scrutiny of the rest of the world for what — of the rest of the world for what you _ of the rest of the world for what you are doing. it is now possible _ what you are doing. it is now possible to know with clarity, through — possible to know with clarity, through satellite technology, where — through satellite technology, where the methane leaks are, what — where the methane leaks are, what the — where the methane leaks are, what the c02 footprint is. so we will — what the c02 footprint is. so we will be able to know, and i think— we will be able to know, and i think general knowledge of who is reneging on their word, and measuring _ is reneging on their word, and measuring what is happening is going _ measuring what is happening is going to — measuring what is happening is going to be huge pressure on people — going to be huge pressure on people all around the planet. you know as well as i do, environmentalists and climate specialists say we have plenty of targets and not enough implementation.- of targets and not enough implementation. that is true and has been _ implementation. that is true and has been true _ implementation. that is true and has been true for - implementation. that is true and has been true for years. | and has been true for years. but — and has been true for years. but at — and has been true for years. but at the _ and has been true for years. but at the moment we had a mandatory structure, which we did in— mandatory structure, which we did in 1997, everybody said, wait — did in 1997, everybody said, wait a — did in 1997, everybody said, wait a minute, we're not going to do— wait a minute, we're not going to do that _ wait a minute, we're not going to do that automatically if the other— to do that automatically if the other guy isn't doing it, so we ran into — other guy isn't doing it, so we ran into a _ other guy isn't doing it, so we ran into a problem. the paris agreement, we got beyond that problem. — agreement, we got beyond that problem, everybody agreed they would _ problem, everybody agreed they would come up with their plan to put— would come up with their plan to out out— would come up with their plan to put out publicly what their reduction levels would be, and that they— reduction levels would be, and that they would allow the self enforcement, if you will, of people's— enforcement, if you will, of people's opinions about your country— people's opinions about your country and your own political opinion— country and your own political opinion that home... because people — opinion that home... because people aren't going to like leaders _ people aren't going to like leaders who are promising clean air or— leaders who are promising clean air or clean _ leaders who are promising clean air or clean water or promising to reduce _ air or clean water or promising to reduce death... but air or clean water or promising to reduce death. . ._ air or clean water or promising to reduce death... but there is no penalty _ to reduce death... but there is no penalty if — to reduce death. .. but there is no penalty if it— to reduce death... but there is no penalty if it is _ to reduce death... but there is no penalty if it is not _ to reduce death... but there is no penalty if it is not met? - to reduce death... but there is no penalty if it is not met? i i no penalty if it is not met? i think there is a domestic penalty— think there is a domestic penalty that anybody pays if they— penalty that anybody pays if they are ignoring their citizens or killing them. sol think— citizens or killing them. sol think there is that kind of accountability, but we don't have — accountability, but we don't have a _ accountability, but we don't have a global police force. a whole — have a global police force. a whole bunch of people don't want — whole bunch of people don't want that, you will never pass it at _ want that, you will never pass it at the — want that, you will never pass it at the un or elsewhere. let's _ it at the un or elsewhere. let's talk about methane, because this was an important part of the agreement, china is the largest methane emitter, but there was no agreement to end fossil fuels and china didn't agree to stop investment in coal and didn't agree to stop investment in coaland building didn't agree to stop investment in coal and building coal plants. why was that? well, the fact is, plants. why was that? well, the fact is. there — plants. why was that? well, the fact is, there is _ plants. why was that? well, the fact is, there is a _ plants. why was that? well, the fact is, there is a big _ fact is, there is a big movement right now to stop any new coal—fired power plant that is not _ new coal—fired power plant that is not able to capture emissions. no permits of any new— emissions. no permits of any new coal _ emissions. no permits of any new coal. there is a big movement also to guarantee renewables being deployed. in certain— renewables being deployed. in certain countries, their main business _ certain countries, their main business is fossil fuels. those countries _ business is fossil fuels. those countries have said to me, we are not— countries have said to me, we are not going to commit economic suicide. so how do you -et economic suicide. so how do you get that— economic suicide. so how do you get that country to do what it needs— get that country to do what it needs to _ get that country to do what it needs to do? the way you do it is try— needs to do? the way you do it is by assisting an agreement where — is by assisting an agreement where they begin to transition, with technology that is able to help them begin to reduce the emissions, to be a good global citizen — emissions, to be a good global citizen. but at the same time, not literally implode their economy. that's a huge part of this problem right now. oil and -as this problem right now. oil and gas makes a lot of money, right? _ gas makes a lot of money, right? the shareholders of those _ right? the shareholders of those companies, the owners of them, _ those companies, the owners of them, don't want to lose that. so how— them, don't want to lose that. so how are _ them, don't want to lose that. so how are you going to pressure them to give it up when — pressure them to give it up when they don't want to do that? — when they don't want to do that? you have to come up with an agreement that entices peopie _ an agreement that entices people away, and literally changes the marketplace. that's what _ changes the marketplace. that's what we — changes the marketplace. that's what we are doing. we are going to see _ what we are doing. we are going to see whole new technologies come — to see whole new technologies come out, they're going to be cheaper. _ come out, they're going to be cheaper, cleaner, and governments and people in countries are going to demand that that's the kind of energy they— that that's the kind of energy they want. we that that's the kind of energy they want-— they want. we will have to leave it there, _ they want. we will have to leave it there, thank - they want. we will have to leave it there, thank you l they want. we will have to l leave it there, thank you so much for your time today. mr; much for your time today. my pleasure. _ much for your time today. my pleasure, thank you. so as you heard from the secretary, a relatively optimistic assessment of the negotiations with his chinese counterpart. it really is something we have heard from other delegates and members of the us administration here, they believe this has been a positive step forward for us china relations.— china relations. sumi somaskanda, - china relations. sumi somaskanda, in - china relations. sumi somaskanda, in sanl china relations. sumi - somaskanda, in san francisco, thank you for your reporting this week. turning now to the war in the middle east. the israeli military says it found a tunnel shaft in the grounds of al—shifa hospital in gaza. the idf released this video, which it says shows an operational tunnel shaft. it also claimed there was a vehicle containing a large number of weapons. the bbc has not yet been able to independently verify the footage, nor the location. but israel has consistently said it believes hamas has an underground command headquarters beneath al—shifa hospital — claims hamas has denied. during the idf�*s raid of the hospital, they also found the body of a hostage near the site. yehudit weiss was abducted by hamas from her home near the israel—gaza border. the israeli foreign ministry says weiss was a 65—year—old cancer patient, whose husband was murdered by hamas in october 7th attacks. her body was reportedly recovered at a building adjacent to the al—shifa hospital. israeli defense forces have beens carrying out "precise and targeted operational activity" within the hospital for a second consecutive day. al—shifa's director says israeli soldiers are still inside the complex, and the hospital has run out of water and oxygen for more than 600 patients being treated there. the idf allowed the bbc to go inside part of the hospital as it comes under growing pressure to prove that hamas has hidden a military command centre our middle east correspondent lucy williamson was taken to the hospital by the israel defence forces and sent this report. it's important to note, our crew's movements were controlled by the idf, and they were not allowed to speak to medical staff or patients. this is what and where israel says hamas has been trying to hide. the entrance of an underground work of tunnels they say uncovered today in the hospital grounds. israel wants to show that hamas is using this hospital as a military base, to explain why israel is too. this vehicle full of weapons was also discovered there today, the army said. israel's army has been keen to justify its military operation inside the shifa hospital. last night, they took us in. we are inside the gaza strip with the israeli army. they are taking us to gaza city and the shifa hospital which, over the last few days of intense fighting, has emerged as the epicentre of this conflict. tonight they are offering us a first glimpse of what they found inside. israel's intense bombardment of gaza has meant growing pressure over the humanitarian cost of their military operation. we are driving into gaza city now and it is clear what it took to take control of this area. whole neighbourhoods have been completely shattered. there are columns of tanks moving through the streets here. the area around shifa is still very tense. we are taken into the hospital in darkness using a light—sensitive camera to film. just clambering through a collapsed wall here in the perimeter of the hospital. we are told to keep all our lights off so it is quite hard to see. they have used armoured bulldozers to punch through here. we are still being told to keep our lights off. are we going this way? inside the hospital, we are shepherded straight to the mri department by israeli special forces. we are not allowed to talk to any doctors here. they have described the situation as catastrophic. now in control of the hospital, israel is under pressure to prove hamas is there. they've been looking for evidence of this being a hamas base. where they planned attacks. and they say that among the things they've uncovered are more than a dozen kalashnikovs, grenades, personal protective equipment, some of it with the hamas insignia, you can see it here hidden under bags of medical supplies. the army also showed us laptops they say contained recent files on the hostages and evidence that hamas had been at the hospital within weeks or days. it seems as if at this point neither the hostages nor hamas are here in any number. we will continue. hamas aren't here because they understood and saw that we're coming and i think had we taken them completely by surprise we would've seen mountains of evidence of hamas' use of the hospital. tonight, a hamas leader in lebanon denied the weapons found in al—shifa belonged to the group. israel came to fight hamas in a place where civilians are fighting for their lives. the battle for shifa hospital is now the eye of the military offensive and gaza's humanitarian crisis. meanwhile, across gaza, communications are down