The Legend of the Nanhai Mermaid(搜神记：南海美人鲛)

In the early years of the Republic of China, the war of separatism continued, and the people suffered terribly. Lu Xinzhi, who grew up in an orphanage, was very clever, but in order to survive, he became a famous rogue in rivers and lakes, wandering around with his sick brother Mao Mao, his younger brother Mao Mao was his right-hand man.