There is no way in hell that only 7 people died. China will not reveal the true magnitude of its failure to the western world. It's just like when one of their rockets wiped out an entire town some years ago.
Off course they are lying. It is what they do. In 2013 when 47 people were killed by the oil tank car explosion in Lac Megantic, we all heard about it. When at practically the same time a mile of oil pipeline exploded in downtown Qingdao, China killing 62 people, nobody heard about it. Here are two links, one showing just how bad an oil pipeline explosion can be in a downtown area, and the other describing what steps have been taken in the aftermath.
http://www.syntao.com/Themes/Theme_Page_EN.asp?Theme_ID=112&Page_ID=16786
The second link also includes reference to a gas explosion in 2003 which killed 243. The role of human error was well documented. Everyone who says all these volatile fuels are safe conveniently forgets human error. Incidentally, which town was wiped out and when?
They have assembled 17 cadavers so far. Something like this is about the best you can hope for.