During the ch'ing dynasty it took part in a rebellion and was ruthlessly exterminated.
"Buddhism and Buddhists in China"
Lewis Hodus
1. Liu Hsien-chou, "Chinese inventions in horological engineering," ch'ing-Hua University Engineering Journal, 1956, vol.
"On the Origin of Clockwork, Perpetual Motion Devices, and the Compass"
Derek J. de Solla Price