A worker walks past oil pipes at a refinery in Wuhan, Hubei province March 23, 2012. REUTERS/Stringer/File Photo

A worker walks past oil pipes at a refinery in Wuhan, Hubei province March 23, 2012. REUTERS/Stringer/File Photo

A worker walks past oil pipes at a refinery in Wuhan, Hubei province March 23, 2012. REUTERS/Stringer/File Photo

June 28, 2016 1:29 PM (UTC+8)