Introduction to Mass Tomb: The provincial cultural relic "Mass Tomb" is the historical evidence of the massacre of fishermen by the Japanese army during the Anti-Japanese War. It is now a cemetery-style patriotic education base. In March 1941, the Japanese invaders entered Haimen City and began their brutal and bloody rule. According to incomplete statistics, in just three months, the Japanese invaders burned more than 1,400 houses, blew up more than 460 fishing boats, at least 570 people were buried alive, and more than 140 people were beheaded, burned to death, and even more were sunk at sea. There are countless. By the summer of 1943, more than 18,000 people had been tortured to death and starved to death by the Japanese invaders. Since corpses were scattered all over the streets, it was difficult to identify them. When the shantang collected the corpses, they could not clearly remember their names, so they could only put numbers on them and carry them to the Red Sand Cave for burial. This is the "Year of Haimen Ranking" in 1943 that the people of Haimen will mourn. After the victory of the Anti-Japanese War, well-intentioned people initiated the idea of burying the bones of more than 18,000 Haimen compatriots who died in Hongsha Cave on the hillside of Lianhua Peak to build a "mass grave".