A donation ceremony was held at the Memorial Hall of the First National Congress of the Communist Party of China on Thursday in Shanghai. The donated collections include the model of C919, China's self-developed large passenger aircraft, the model Fenli, specially designed and built for the salvage operation of the Yangtze River Estuary No 2 ancient vessel, and the flag signed by the 27th Antarctic expedition team, which has witnessed the development of China's polar research efforts. （Photos:Lu Ting/GT）