Ni books can't be used after registration. According to the relevant public information, Ni is a registered trademark, and the continued use of books will infringe upon the interests of trademark owners and cause serious infringement, which will lead to abnormal use. Ni, an American Chinese medicine practitioner, was born in Taiwan Province Special Administrative Region, China, born in Rui 'an, Zhejiang, with dual nationality, and founded the Han and Tang Classic Chinese Medicine Clinic in the United States.