????ä¸??½ä????¨ä?绩è???ä¼?ä¸?表示ï¼????¸ä???é£?2021å¹???æ­£å?签署5??919客æ?ºç????è´???è®??é¦???919é£??ºå·²äº?2022å¹´å?交ä????¸ï?é¢?计å?äº?è¿??????¥å???è¿??¥ã??C919å°?以ä?海为主è??ºå?°å??ä¸?è¿??¥ã?????¸æ????022??2023å¹´å???5??919å¼?è¿?ï¼?并å??¹æ?????è¿??¥æ???µå?????¸è???è§???ï¼??³å???ç»??è¿?计å????