To look at pictures, you can't just look at inscriptions and inscriptions! There is nothing on Zhang Zeduan's Riverside Scene at Qingming Festival, and there is no signature! I know it from the inscriptions of later generations, and see if the material of silk, the pen and style of the picture are the genre paintings of the Northern Song Dynasty! Calligraphy and painting appraisal, after all, is the usual knowledge accumulation!