How many days you can use for Emeishan Ticket for all the stations: 90RMB ?

Hi, I have some question about shuttle bus
• How many days you can use for "Ticket for all the stations: 90RMB" ?
• Can i take bus from Baoguosi - Leidongping on the 1st day
and 2nd day Leidongping - Wannian + Wuxiangang - Baoguosi with only one 90RMB ticket ?

Reference
Ticket Price of Mount Emei Shuttle Bus:
Baoguosi Bus station - Wuxiangang Bus Station: 20RMB
Baoguosi Bus station - Wangniansi Bus Station: 20RMB
Baoguosi Bus station - Leidongping Bus Station: 50RMB
Ticket for all the stations: 90RMB