PetroChina Instant Messaging app is mainly a software for internal communication of PetroChina. Through this software, users can receive important information and documents in real time, which is more convenient to work and find people, but they can't give lectures.
PetroChina refers to China Oil and Gas Co., Ltd. ("China Petroleum" or "PetroChina" for short), which is the largest producer and seller of oil and gas in China oil and gas industry, a state-owned enterprise, one of the largest sales companies in China and one of the largest oil companies in the world.