The People's Bank of China (PBoC) increased its gold reserves by nearly 10 tonnes last month, its 19th consecutive month of bullion purchases, according to the latest government data.The State Administration of Foreign Exchange (SAFE) announced on Sunday that China's official gold reserves rose by 320,000 troy ounces or 9.95 tonnes in May to a total of 74.96 million troy ounces or 2331.52 tonnes.