Additionally, the methodology of classics critique by the Kinbun learning school which flourished from the end of Qing brought a climate of clarification of truth or falsehood of old books, and in 1927, the Giko-ha school including Ko Ketsugo published "Koshiben" (telling right from wrong about old history), which discussed forged Keisho and ancient history.
また清末から隆盛した今文学派による古典批判の方法論は古籍に対する弁偽の風潮を興し、1927年、顧頡剛を始めとする疑古派が経書や古史の偽作を論ずる『古史弁』を創刊した。