Sky Bow

The Sky Bow, or Tien Kung (Chinese: 天弓; pinyin: Tiān gōng), are a series of surface-to-air anti-ballistic missile and anti-aircraft defense systems developed by Taiwan's National Chung-Shan Institute of Science and Technology (NCSIST). Development of the TK-1 was completed in 1986 and this system is now retired. The TK-2, TK-3 and TK-4 are in service with the Military of the Republic of China.