** Hong Kong shares of Chinese EV maker BYD Co 1211.HK rise 4.5% to an all-time high of HK$345, set for fourth consecutive session of gains

** Stock second-biggest gainer in Hang Seng Index .HSI and Hang Seng China Enterprises Index .HSCE which both are up 0.1%

** Shenzhen-listed stock 002594.SZ climbs 3.1% to 340.3 yuan, highest since July 2022

** BYD on Monday started offering advanced autonomous driving features on most of its models including ones priced as low as $9,555, far undercutting competitors such as Tesla in a move analysts say is set to start a new price war

** Stocks of rivals fall with Xpeng 9868.HK down 6.5% and Geely 0175.HK falling 7.7%

** "Era of smart driving popularization has come," Nomura, which has "Buy" rating on BYD, wrote in a note

** Citi sees positive implication from BYD Intelligent Strategy Event saying the event is postive to its supply chain with smart drive solution provider BYD Electronic 0285.HK the major beneficiary, followed by automotive camera supplier Will Semiconductor 603501.SS and Sunny Optical 2382.HK

** Shares of BYD Electronic rises 1.8%, Will Semiconductor climbs 1.5% and Sunny Optical jumps 5.9%

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))