** Shares of Sihuan Pharmaceutical Holdings Group Ltd 0460.HK fall 3.4% to HK$0.56, extending losses for a second session

** Stock posts its biggest intraday pct drop since Jan 22

** Sihuan expects to record revenue of not less than 1.80 bln yuan ($248.25 mln) and a net loss of not more than 600 mln yuan for 2024, as generic drug business declines amid centralized procurement policy in the mainland and high R&D expenses

** This compares with a revenue of 1.86 bln yuan and a net loss of 54 mln yuan in 2023

** Hang Seng Commerce & Industry Index .HSNC rises 1.7%, healthcare index .HSCIH gains 0.5% and Hang Seng Index .HSI adds 1%

** Stock climbed 1.5% last year

($1 = 7.2507 Chinese yuan)

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))