As the U.S. and Iran inch closer to the ceasefire expiration, Andrew Chang explains why for China, Iran's No. 1 oil consumer, the war in the Middle East is both deeply destabilizing and helpful to a much longer-term strategic goal. Images provided by The Canadian Press, Reuters and Getty Images »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@