** Shares of Biocytogen Pharmaceuticals (Beijing) 2315.HK climb 5.7% to HK$8.71, on course for the biggest one-day pct gain since December 18, 2024

** Stock on track for third straight session of gain

** The Chinese drug developer says it has completed the localized deployment of DeepSeek R&D platform, achieving full synergy between DeepSeek and the firm's core business - the Project Integrum

** Says the technology integration marks a new stage of intelligence and data-driven approaches in early antibody drug R&D, accelerating the R&D process and promoting rapid development of antibody drugs

** Hang Seng Tech Index .HSTECH drops 4.3%, healthcare index .HSCIH falls 3%, Hang Seng Index .HSI eases 2.7%

** Stock up 1.3% YTD

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))