It was announced at the beginning of 2015 that CAST had completed installation of payload equipment of the application system onboard Tiangong 2 space lab,which had been delivered for electric test.It was a key point in the integation process of the Tiangong 2 space lab.Compared with the former Tiangong 1 target spacecraft,the application system of Tiangong 2 consists of brand It was announced at the beginning of 2015 that CAST had completed installation of payload equipment of the application system onboard Tiangong 2 space lab, which had been delivered for electric test. It was a key point in the integation process of the Tiangong 2 space lab. Compared with the former Tiangong 1 target spacecraft, the application system of Tiangong 2 consists of brand