ye oversaw the design and installation of china's first 100-kilowatt broadcast transmitter and its largest rhombic antenna network. he was the first chinese scientist to research microwave communication in 1956, and later created china's first phase rectifier and direct coupling filter for microwave waveguide. in 1964, he pioneered the research of free-space optical communication in china. after 1978, he focussed on the research of fiber-optic communication and made a series of significant discoveries that reduced noise and interference in fiber-optic transmission. he published more than 400 papers and five monographs.