????:1???????????:?????

2??????????

3??????

4???????

5???????

2025???????????????????1???1???????,??C919????MU721“?????????????????”???,???

“?????????????2025????,?C919???,??????????……”2025??????,??????????,??C919????????MU721“??????????????????????????????”??,?????????C919????????????????????9??,??(?? ???? ?????)

??:???????????