Introduction to the Bamboo Garden: Behind the house was originally a river ditch with gurgling water. There were green bamboos and green trees beside the ditch, and there were waterwheels and other agricultural tools. With the passage of time, Zhaihe ditch gradually formed an inkstone-shaped Xiaohe ditch, which is now called Yantai ditch. The ditch is where Zhang Wentian often read and played with his friends when he was a boy.