On-demand helicopter services gained momentum during the Chinese New Year amid a travel rush, giving a boost to the country’s low-altitude economy.Demand increased significantly during the hectic holiday period, with overall bookings rising nearly 1.5 times compared with normal levels, said Li Xin, a manager at Shanghai Xinkong Helicopter, in an interview with China Central Television (CCTV).Capitalising on the rush, the operator launched a new route on Monday linking Shanghai with Haimen and...