If you encounter issues booking Zhangjiajie-Chongqing train tickets, it may be due to international payment or language restrictions. There are 3-4 daily regular-speed trains (e.g., K688, K74), taking 5.5-6.5 hours with hard seats around CNY 69. Professional platforms or agencies can assist with bookings. For hassle-free ticket service or travel plans, email service@intotravelchina.com for support.