Complex sentence: These were delivered to China and re-assembled at Nanyuan near Beijing, flying its first service, carrying both airmail and passengers between Beijing and Tientsin on 7 May 1920.
Split into simpler sentences: These were delivered to China and re-assembled at Nanyuan near Beijing. The aircraft flew their first service, carrying both airmail and passengers, between Beijing and Tientsin on 7 May 1920.