Could you say me the frecuency of the bus to Leshan fron Xiananmen bus station and viceversa?Thanks

The bus from Xinnanmen Bus Station are frequent till 16:00. There is not a fixed schedule. One bus leaves when it is full. The bus fare is around 47RMB per person.
The bus from Leshan Xiaoba Bus Station are from 07:00 to 19:00 and the interval is around half an hour.