Starting from Zunyi. Arrive in Kaili, get off and take bus 1 to Ximahe bus station of Kaiyun Company.
When you arrive at the station, ask about the departure time and interval of the first and last buses, which is convenient for you to travel.
Round-trip ticket from Xijiang to Kaili per person 13.5 yuan.
After arriving in Xijiang by bus, you can buy the lowest discount tickets in the scenic lobby with your student ID card and enter Miao Village at half price.
Students have the lowest discount. Don't trust scalpers who evade tickets because their prices are the same as yours. Moreover, they don't have tickets, so it will be inconvenient to enter Miao Village without tickets.
Finally, I entered Miao village, and all the scenic spots were one-vote system. The Xijiang River was not big, and I had enough swimming in one and a half days.
I hope my answer will satisfy you. Have a nice trip.