What did you bring out from the ancient waterway in Yicheng, Xiangxi?

A coffin with an open lid. According to the relevant data of Xiangxi, the coffin with cover was transported out of the ancient waterway of Yicheng, Xiangxi. Xie Chen Yu found his uncle's next destination, Guzhang Yicheng Waterway in Xiangxi, and found an open coffin in the waterway, which was a whistle coffin. Only the Zhang family with different skills can open it.