It is a letter asking about the condition of He Xun, a friend of Lu Ji, a famous writer and calligrapher in the Western Jin Dynasty (AD 261~303).

Letter of Recovery was written on jute paper and affixed with an ivory seal. It is 23.7 cm high and 20.6 cm wide. It has 86 Chinese characters in nine lines. The characters are sturdy and full of vitality. It is claimed to be the earliest Chinese calligraphy existing in the world.

In 1956, Zhang Boju donated Letter of Recovery to the Beijing Palace Museum.