** Star Plus Legend Holdings 6683.HK soars 20% to HK$10.01; set for biggest one-day pct gain since July 23
** Stock hits highest since November 4; on track to snap four-session gaining run
** Intellectual property creator and operator's unit forms equally-owned JV with Beijing Lingyi Technology - unit of robotics group Yushu Technology
** Says JV will be responsible for creation, development, operation, promotion, sales of consumer-grade IP robots, including pet quadruped robots, performing humanoid robots, IP derivative products
** YTD, Star Plus shares surges 97.6%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))