Patented tofu products

According to historical records, the alchemist under Liu An, the king of Huainan in Han Dynasty, who pioneered the technology of tofu, used the juice of grass roots as a coagulant to make white and delicate tofu.

The "Lvbao" brand tofu invented by Guo Xiukun of Xu Dong Village, Zhoujia Town, Shuangcheng City, Heilongjiang Province is a pure Chinese herbal medicine and won a national patent.

In August, 2005, at the China Patent Technology and Products Fair, the American International Business Association obtained a patent for the production of American "Lvbao" brand tofu at a purchase price of 6,543,800 yuan.