1966年于韓國慶州長佛國釋迦塔內發現一印本《無垢凈光大陀羅尼經》，經文為漢字，且有武周制字，經中外學者考證，為武周后期（690-705）中國洛陽刻印。

    In 1966,a copy of the Dharani Spotless Pure Light was recovered from the Sokka Pagogda in Pulguk-sa Monastery in Kyongiu, Korea, This sutra was writen in Chinese and some of the characters were of the Wu-Zhou Dynatsy. Chinese and foreing scholars have determined that it was engraved and printed in Luoyang, China, during the latter part of the reign of Empress Wu Zetian(690-705).