Is it true that Qi Baishi is over 93 years old?

Qi Baishi recorded such a thing in his memoirs: 1937, he listened to a fortune teller in Changsha and used his ability to hide the sky and cross the sea to add three years to his signature works! So some of his works are marked by the method of virtual three years old. So what we can see is that most of his works in the last year are self-titled at the age of 97. This is recorded in public information, and so is his last work, Peony in the Wind. So some works were signed at the age of 97 or 98.