What are Li He's works describing the ghost world?

Li He wrote a lot of "ghost poems" in his life. Among his more than 200 works, more than ten are "ghost poems". There are Qiu Lai, A Journey to the South Mountain, Sword Song in Spring Square, Su Xiaoxiao's Tomb, Nanyuan Garden, Five Satiries, Father and Songs of Luofushan, Wushan Gao, Fairy Songs and so on.