Closer Look: Days after Qingdao Blast, Major Questions Still Unanswered

(Beijing) – A deadly explosion caused by a leak in an oil pipeline owned by China Petroleum & Chemical Corp. (Sinopec) in the eastern city of Qingdao on November 22 has killed at least 55 people, injured 166 and left nine missing. However, three days after the accident, many basic questions remain unanswered.

The first is the simplest: In which pipeline did the leak occur?