Which calligrapher’s cursive style is that of Qi Baishi?

The character’s cursive writing is He Shaoji’s.

Qi Baishi is highly accomplished in cursive writing and his works are deeply loved by everyone. Therefore, He Shaoji's cursive writing was written by Qi Baishi.

Qi Baishi, formerly known as Chunzhi, with the courtesy name Weiqing, and the nickname Lanting, later changed his name to Huang, with the courtesy name Binsheng, and the nicknames Baishi, Baishi Shanweng, Laoping, Hungry Sou, the owner of the borrowed mountain chanting hall, Ji Ping The old man in the hall, a rich man with three hundred stone seals, was born in Dangshan, Suzhou, Anhui. He was born in Xiangtan, Changsha Prefecture, Hunan (today's Xiangtan, Hunan). He is a master of modern Chinese painting.