扫地僧

sǎo dì sēngsaodiseng

1. Sweeper Monk, nameless monk who maintains the library of Shaolin (from Jin Yong's novel "Demigods and Semidevils" 天龍八部|天龙八部[Tian1 long2 Ba1 Bu4])
2. (fig.) person whose remarkable talents are not well known

Study it in Yanamino