Does Mr. Kong Lingang charge for the Book of Changes?

Charge. Kong Lingang's Yi-ology training really exists. This training institution is affiliated to China Shixuanzhai Group Co., Ltd., which is a high-end intelligent training platform focusing on the research, inheritance, promotion and development of Yi-ology, making the obscure Yi-ology culture easy to remember and understand, and helping more people learn and understand Yi-ology.