This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Mao to gaoheng letter . en Letter from Mao Zhedong to the scholar Gao Heng The text reads top to bottom Right to left PDChina Mao Zhedong Shandong university
Page 2023 Free-images.com. All images are Public Domain