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

2????????vx

3????????

4????????

5???????

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

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

???:???