Is the physical book of any medicine out of print?

No. "You Yao" is a group time travel article. The background of the story is set in an imaginary ancient world, the Great Liang Dynasty. Due to the sudden appearance of a large number of travelers from modern society, the government and the public were in turmoil. As of August 14, 2022, the book "You Yao" is still produced and sold by Xinhua Publishing House. It is still available for purchase in major Xinhua bookstores and is not out of print.