Are there buses from Chuanzhusi to Bipenggou?

No direct bus is available. You are suggested to take a bus to Wenchuan at Chuanzhusi Bus Station first. Only one bus serves for this route daily, leaving at 14:00 and it takes 3-4h. After that, change to another bus to Lixian County at Wenchuan Bus Station. You will get there in an hour at a cost of CNY20. Then the distance to Bipenggou is 20-30km. You may rent a car or take a taxi to reach directly.