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The terahertz(THz)regime is the frequency window to be fully explored in astronomy.Dome A in Antarctic,with an altitude of 4093 m and temperature below-80 Celsius degree in winter,is regarded as the best site on earth for astronomical observations in this frequency regime.Currently,China is proposing to build an observatory there,in which Dome A 5m Terahertz Telescope(DATE5)is one of two major telescopes.This talk will mainly present the development of THz superconducting mixers and detectors for DATE5.