Is Dr. Zhao Yang a scammer who sells nursing devices?

Not a liar. According to the query related information shows that Dr. Zhao Yang did not sell feed light instrument, just to give you a recommendation to illustrate the usefulness of feed light instrument, Dr. Zhao Yang is a member of the Chinese Medical Association ophthalmology branch, China Healthcare International Exchange Promotion Association ophthalmology branch of the young members, so it is not a fraud.