Crossing the river by ferry from Baisha and taking the train to Yongchuan are the cheapest recently, and the fare is only a few dollars. There are two buses to take, one is the express train from Chongqing to Zhaotong. After nine o'clock in the morning. The first train is the local train from Chongqing to Neijiang, which seems to be past ten o'clock. You can only go to Jiangjin and then Yongchuan by car. The fare is about forty yuan.
It is more cost-effective to take the train, and the time is similar.