Prime Minister Kaja Kallas (Reform) says that activities by the government organs of the People's Republic of China are an increasing challenge for Estonia, other small countries, and democracies as a whole. She has also welcomed an open letter published Wednesday, which expressed concerns and issued a call to action on the issue. Kallas told ERR's online news in Estonian Thursday afternoon that she was: "Pleased with the public appeal on China's influence, signed by close to 70 scientists, cultural figures, journalists and MPs. It is important to think about, as well as be ready to stand up for, our values."