Khayishan greatly favored Buddhism, so that he ordered the Tibetan Lama Chogdi Osor to translate the sacred books of Buddha. When the Buddhist monks made mistakes except in cases affecting the Yuan dynasty, he refused to punish them. A law was passed that whoever struck a Lama should lose his tongue, but Ayurbarwada repealed it as entirely contrary to precedent. However, Khayishan was the first Khagan to tax the lands held by the Buddhist monks and the followers of Taoism, hitherto exempt.