** Hong Kong shares of Chinese electric-vehicle maker BYD Co Ltd rise 5.9% to HK$227, the highest since Feb. 24, and on course for third consecutive session of gains
** Stock is the biggest percentage gainer in the benchmark Hang Seng Index ; the third most actively traded by turnover
** BYD Co's chairman Wang Chuanfu said in China Auto Chongqing Summit 2021 that the company was willing to work with Xiaomi in automobile arena and was in negotiation on certain projects, Hong Kong Economic Journal reported citing mainland media ()
** BYD Co's Shenzhen shares rise 2.3%
** Smartphone maker Xiaomi gains 1.2%, the fifth most actively traded by turnover
** The Hong Kong Hang Seng Commerce & Industry Index eases 0.2%
** The Hang Seng China enterprises index slips 0.7%, and the benchmark index slides 0.6%
(Reuters Messaging: donny.kwok.thomsonreuters.com@reuters.net, editing by Louise Heavens)