Observations of Large-Scale Phenomena During 1985/86 Apparition of Comet Halley at Yunnan Observatory

During the period of December 1985 to April 1986, before and after, perihelion passage of Comet Halley, Yunnan Observatory performed the Large-scale phenomena observations in Kunming and . Simao, respectively. The data of the post-perihelion arc more.complete, especially in the time of encounter with five spacecraft, nearly day-to-day data are gained, and the frequent tail activities are also recorded.Finelly, the processes -of .the tail activities and its relation with solar actiyity are discussed preliminaryly.