HONG KONG (AFX-ASIA) – Petrochina Co Ltd unit Chinaoil (Hong Kong) Corp Ltd has secured a 21-year land grant, with a total premium of HK$501 million, from the Lands Department, a government spokesman said. (US$1=HK$7.78). In a statement, the spokesman said Chinaoil put in the highest bid for the land grant, beating five other contenders….