Chinese leader Xi Jinping met with Joe Biden on Saturday.
Carlos Garcia Granthon/Fotoholica Press/LightRocket/Getty Images
- Chinese leader Xi Jinping has outlined his "four red lines" to US President Joe Biden.
- The hot-button issues concern democracy and China's development.
- Xi's comments came two months ahead of President-elect Donald Trump's inauguration in January.
It will be another two months before US President-elect Donald Trump takes office, but China...