Nothing has changed in China's foreign policy despite it's role in the U.S.-Iran ceasefire: CFR

Zongyuan Zoe Liu of the Council on Foreign Relations says that China holds greater leverage than Washington over Tehran, but values its relationship with the former more due to the risks it could pose to the global system. She also discusses the potential of the "petroyuan", the upcoming Trump-Xi meeting, and the role of Chinese Foreign Minister Wang Yi in the brokering of a ceasefire between the U.S. and Iran.