entire time he was in office and for three of these years in china, that is the one, that china bank account is raising a lot of eyebrows and has a lot wondering when did that start? what exactly was going on there? what were the business interests in china? >> also, some tax experts are raising questions about his business figures. what can you tell us about that? >> reporter: so this is about expenses and profit that trump claimed. in one example, 2017, one of donald trump's companies, djt claimed it made a very specific number and claimed that exact amount in expenses. now, according to one tax expert, they said that this was a statistical impossibility. the reason why that matters is because if you make $42,000 and you spend $42,000, the net is zero meaning there is nothing there to tax, so, again, just raising questions, saying this