Wenchang Satellite Launch Center (WSLC), located in Wenchang, Hainan, China, is a former sub-orbital test center currently under upgrade. It is China's fourth and southernmost space vehicle launch facility (spaceport. It has been specially selected for its low latitude, which is only 19 degrees north of the equator, which will allow for a substantial increase in payload, necessary for the future manned program, space station and deep space exploration program.