generate questions: According to China daily. Fifteen years after the satellite system was launched, it is now generating $31.5 billion for major companies such as China Aerospace Science and Industry Corp, AutoNavi Holdings Ltd, and China North Industries Group Corp.
How long ago was the BeiDou Satellite System first launched? {sep_token} How much revenue for companies is generated by the BDS system? {sep_token} What are some companies that profit from the BDS system? {sep_token}