Baidu looked at it and knew that the font size of the original words of Heart Sutra was about 2.5 cm. Because it is a running script, some strokes are slightly longer and the words reach 3 cm.
Zhao Mengfu was born in a.d. 1254- 1322, and he was a Taoist priest in the song dynasty. He is also known as the Taoist of the Crystal Palace and the Taoist of the Water Mirror Palace. Wu Xingjin was a native of Huzhou, Zhejiang Province, and was an official in the late Song Dynasty and early Yuan Dynasty.