"My name is Wan Shi Tong, 'He who knows ten thousand things.' I brought this library to the mortal realm to share my knowledge so that humankind can improve itself... To gain access, one must first contribute to it."
Long ago, Wan Shi Tong brought his library from the Spirit World to the physical world. Together with his band of knowledge-seeking foxes, he collected knowledge from all over the world. He put it all on display in his library for humanity to read and hopefully better itself.
Although he left his great collection of knowledge available to the mortal world for many years, he later became angry at humankind when he saw that apparently they used the library's knowledge for the purposes of war.