sentences:  His study of cosmic-rays lead him to publish his findings on neutral-meson decay in 1955.By 1957 he had collected more than 700 recordings of new types of particles.In order to develop the field of high energy physics in China, in 1956 the Chinese government began to send experts to the Joint Institute for Nuclear Research at Dubna in the Soviet Union to do field work and carry out preliminary design of particle accelerators.