Elon Musk, the CEO of Tesla ($TSLA@US) and SpaceX, recently concluded his first visit to China in three years. During his trip, Musk met with Chinese officials and business leaders to discuss expanding Tesla's business there. He met with Foreign Minister Qin Gang, the chairman of Contemporary Amperex Technology Co Ltd, and China's commerce and industry ministers. Musk also visited Tesla's Shanghai factory and had a meeting with Chinese Vice Premier Ding Xuexiang. Throughout the trip, Musk was notably quiet on Twitter. However, he broke his silence on Thursday with a post praising SpaceX.