As its name suggests, PetroChina Company Ltd is the listed arm of state-owned China National Petroleum Corporation (CNPC). It is China's biggest oil producer, and is listed in Hong Kong, New York, and Shanghai.

A worker examines a pumpjack at a PetroChina oil field in Panjin, Liaoning province, in this June 30, 2014 file photo. China's imports tumbled in August 2015, adding to concerns about the health of the world's second-largest economy and its contribution to global growth. Imports dived 13.8 percent from a year earlier, far more than the dip of 8.2 percent forecast by analysts, and the tenth consecutive monthly drop, reflecting both lower global commodity prices and sluggish demand. Much of China's imports are commodities and other raw materials going into factories that turn them into goods for sale overseas, so the fall could be an ominous sign for exports in the coming months. REUTERS/Sheng Li/Files TPX IMAGES OF THE DAY CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA

PetroChina, CNPC said to consider pipeline, refinery sales

PetroChina and its state-owned parent are planning to sell assets before the end of the year that may include stakes in pipelines and refineries as the country’s biggest oil and gas producers seek to shore up their balance sheets, according to sources.