This file photo shows the building of PetroChina in Shanghai. On September 27, 2005, the Jilin Chemical Industrial Co, both listed in Hong Kong and Shenzhen, is brewing an across-the-board buyback for its share reform, and its parent PetroChina plans to buy back Jilin Chemical Industrial Co's all tradable A shares and then list it in the mainboard in Shenzhen. [newsphoto]