China’s exports held up in August, buoyed by strong demand for tech products and pre-Christmas orders, even as extreme weather hampered logistics at some ports and trade headwinds persisted.The country’s exports rose by 25 per cent year on year to US$401.44 billion last month, according to Chinese customs data released on Tuesday. The reading was above a forecast of 21.93 per cent growth from economists polled by financial data provider Wind. That compared with 23.9 per cent growth in...