Introduction to the bloody Liu Laozhuang theme trench: The bloody Liu Laozhuang theme trench was built in 2007 and is located in the east of the cemetery. It is a vivid reproduction of the original site of the Liu Laozhuang battle at a scale of 1:1. The tragic scene of the two martyrs dying for their country. The trench is 19.43 meters wide and 82 meters long. There are 35 groups of figure sculptures. The lifelike expressions make visitors feel more real.