** Hong Kong-listed shares of WuXi AppTec 2359.HK jump 17.5% to HK$148, their highest level since December 2021
** Stock marks its biggest intraday pct gain since October 2024, and is top pct gainer in benchmark Hang Seng Index .HSI, which slips 0.3%
** Shanghai-listed stock 603259.SS rises 9.9% to 110.5 yuan
** China-based new drug developer and manufacturer says its first-quarter net profit up 26.7% y/y to 4.65 billion yuan ($681 million), with revenue up 28.8% y/y to 12.43 billion yuan
** YTD, Hong Kong stock up 46.7%, Shanghai-listed shares up 21.9%
($1 = 6.8283 Chinese yuan)
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))