** Shares of Star Plus Legend Holding 6683.HK soar as much as 36.7% to HK$15.36, their highest since July 14
** Stock on track for the biggest one-day pct gain since July 9
** The intellectual property (IP) creation and operation group, with current market capitalisation of $1.55 bln, said its unit has teamed up Chinese robotics firm Hangzhou Yushu Technology on development and commercialization of quadruped robot dogs
** Co says the robots will have companionship functions and social interaction features
** Hang Seng Tech Index .HSTECH falls 1.4%, benchmark Hang Seng Index .HSI slips 0.4%
** YTD, stock up 188.2%
($1 = 7.8498 Hong Kong dollars)
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))