You can take CMB from Linquan to Fuyang, take the train to Dazhou, Sichuan, change trains in Wuhan, and then transfer to Bazhong by train or bus after arriving in Dazhou. The screenshot of relevant train information is as follows for reference:
Fuyang-Wuhan
Wuhan-Dazhou
Dazhou-Bazhong (train sequence)
Dazhou-Bazhong (shuttle frequency)