On May 27, on the first anniversary of the commercial operation of the domestic large aircraft C919, China Eastern Airlines, as the first user of the C919 worldwide, officially received the first aircraft of the newly ordered 100 C919 aircraft; On June 1, the C919 flew commercial charter flights between Hong Kong and Shanghai. On June 5, China's domestic commercial aircraft C919 and ARJ21 made their first test flights with sustainable aviation fuel (SAF). On June 14, the C919 started the operation of the fourth commercial regular route; On...