How many groups of foam cement backfill treasures are there?

Three families.

The group spirit has a long history, which began in the Tang Dynasty and formed a market in the Song Dynasty. Historically, the spirits of ancient towns have always been a battleground for military strategists. Cao Cao was in Wulin An Lushan, where Zhu Yuanzhang defeated Chen Youliang; Business has been booming. During the Ming and Qing Dynasties, merchants gathered and the market flourished, making it one of the important commercial ports along the Yangtze River. Tuanfeng gave birth to Bao Huisheng, a representative of the Party, a revolutionary, Li Siguang, a giant of modern geological science, a translator of Das Kapital, a philosopher Xiong Shili, a writer Qin Zhaoyang, a thinker Yin, a calligrapher Zhang Jingyie, a strategist Lin Biao, a writer and Mao Dun literature winner Liu Xinglong and many other celebrities.