At that time Ryoo practiced asceticism and also read books such as, "Nankai-kiki-nai-hoden" by Gijo and "The Great Tang Dynasty Record of the Western Regions" (Da Tang Xiyu ji) by Xuanzang.
この頃の了翁は、苦行のかたわら義浄の『南海寄帰内法伝』、玄奘の『大唐西域記』を読んでいる。