According to Baidu Encyclopedia, the seven sons of Lanting are the top seven people who scored the highest in Lanting Award. Seven sons of Lanting can only be put in place after several rounds of elimination, and the weight is naturally higher, so seven sons of Lanting are more powerful.
Lanting Award is the highest award of calligraphy art in China, which is approved by the Propaganda Department of the CPC and sponsored by China Federation of Literary and Art Circles and China Calligraphers Association. It is one of the 18 national literature awards.