** Hong Kong shares of Metallurgical Corporation of China 1618.HK drop 21.4% to HK$1.87, on course for the biggest one-day pct fall since debut in September 2009

** Stock hits the lowest level since August 8 after three straight sessions of gains

** Shanghai-listed shares 601618.SS fall 10% to 3.05 yuan, lowest point since August 8

** The China-based engineering construction group plans sales of entire equity interest of MCC Real Estate, Non-ferrous Engineering, MCC Tongsin Resources, MCC Ramu and a 67.02% stake in MCC-JJJ Mining to controlling shareholder China Minmetals Corp for 60.68 bln yuan ($8.58 bln)

** "It will enable the Group to streamline its business structure, concentrate resources on its principal operations and enhance its long-term competitiveness and profitability," Co said, adding the divestment aligns with national policy and industry trends

** YTD, Hong Kong stock up 17.7%, Shanghai-listed shares up 2.7%

($1 = 7.0687 Chinese yuan)

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))