** Hong Kong shares of Semiconductor Manufacturing International Corp 0981.HK climb 6.1% to HK$78.7
** Stock set for the biggest one-day pct gain since May 20; third biggest pct gainer on Hang Seng TECH Index .HSTECH, which rises 2.3%
** Shanghai-listed stock 688981.SS gain 3.9% to 132.18 yuan
** SMIC says its plan to acquire stake in unit SMNC approved by securities regulator
** China's top foundry SMIC planned to buy the remaining 49% stake in SMNC from the unit's five shareholders for 40.6 bln yuan ($5.79 bln) in a deal to be settled by issuing 547.2 mln A shares
** YTD, Hong Kong stock up 9.7%, Shanghai-listed shares up 7.2%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))