At the same time PetroChina acquired some assets from China United Coalbed Methane.

[citation needed] China Coal Group's subsidiary, China Coal Energy, has been listed on the Hong Kong Stock Exchange since 2006 and the Shanghai Stock Exchange since 2008.

[9] China Coal Group later acquired 3.9% stake of Taiyuan Coal Gasification Group from fellow central government owned China Cinda Asset Management, but in 2013 transferred 16.18% stake to SASAC of Shanxi Province without compensation.

[10] In 2014, China Coal Group promised to inject "Heilongjiang Coal Chemical Group" and "Shanxi Huayu Energy" to the listed company in order to avoid competition.

In 2016, Shanxi Huayu Energy delayed a week to pay off principal and interest in full for a bond.