Apple reported a sales boost in mainland China, Hong Kong and Taiwan in the June quarter, aided by Beijing’s consumer subsidies, following a prolonged decline in the region amid intense competition and weak consumer spending.In the three months ended June 28, Apple’s Greater China revenue grew nearly 4.4 per cent year on year, rising to US$15.37 billion from US$14.73 billion, according to the company’s latest financial results released on Thursday.CEO Tim Cook attributed the quarterly growth,...