** Shares of online literature and intellectual property incubation platform China Literature 0772.HK drop 8.3% to HK$24.20, their lowest since April 9

** Stock on course for its biggest one-day pct decline since April 7; top pct loser on Hang Seng Tech Index .HSTECH, which falls 1%

** Index compiler Hang Seng Indexes Co Ltd said on Friday China Literature will be removed from Hang Seng Tech Index .HSTECH, while BYD Co 1211.HK will be included in the index from June 9

** Midea Group 0300.HK and ZTO Express 2057.HK will be added to the Hang Seng Index .HSI, increasing the number of constituents to 85 from 83

** Shares of Midea and ZTO climb 1.8% and 3.7%, respectively

** TYK Medicines 2410.HK and Kangji Medical 9997.HK will be added to Hang Seng Biotech Index .HSHKBIO, while Alphamab Oncology 9966.HK and RemeGen 9995.HK will be removed from the index

** TYK and Kangji rise as much as 2.4% and 4.2%, respectively

** Hang Seng Index .HSI slips 0.4%, while Hang Seng Biotech Index .HSHKBIO gains 0.8%

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))