Most of Hong Kong and other parts of southern China ground to a near standstill on Friday with classes and flights cancelled as powerful Typhoon Saola approached. Many workers stayed at home and students in various cities saw the start of their school year postponed to next week. Trading on Hong Kong’s stock market was suspended and about 460 flights were cancelled in the key regional business and travel hub.Most of Hong Kong and other parts of southern China ground to a near standstill on Friday with classes and flights cancelled as powerful Typhoon Saola approached. Many workers stayed at home and students in various cities saw the start of their school year postponed to next week. Trading on Hong Kong’s stock market was suspended and about 460 flights were cancelled in the key regional business and travel hub.