Is Huang 300 yuan's calligraphy a scam?

No. According to relevant data, Huang is a Buddhist named Mo Yuan, a member of China Calligraphers Association and the president of Wudang Laozi Painting and Calligraphy Institute. Successively served as vice chairman of Shiyan Calligraphers Association, dean of Wudang Mountain Taoist Painting and Calligraphy Institute in Hubei Province, director of Taoist Folklore Research Association, and consultant of Qinba Cultural Excavation Management Committee, which shows that Huang San Baiyuan calligraphy is true.