No. According to the Query Calligraphy Network, as of August 9, 2023, calligrapher Ke Yunhan has not written calligraphy for Wanwei Island. Ke Yunhan, born in Zhangpu County, Fujian Province in 1958, has a master's degree. He is currently the fifth and sixth director of the Chinese Calligraphers Association and a professor at the Calligraphy Training Center of the Chinese Calligraphers Association.