Top Hong Kong and Beijing officials have backed the city to overcome its present challenges and play an important role in China’s international trade strategy.Speaking at the annual Belt and Road Summit in Hong Kong on Wednesday, the city’s embattled leader Carrie Lam Cheng Yuet-ngor and senior officials from Beijing’s foreign and commerce ministries said social stability and long-term prosperity were intrinsically linked.The two-day summit, held against a backdrop of increasingly violent anti…