http://124.222.62.86/yd-data/YD-CH32V307VCT6/YD-CH32V307RC/CH32V307RCT6-SCH.pdf
http://124.222.62.86/yd-data/YD-CH32V307VCT6/YD-CH32V307RC/CH32V307RCT6-SIZE-I.pdf
http://124.222.62.86/yd-data/YD-CH32V307VCT6/YD-CH32V307RC/CH32V307RCT6-SIZE-M.pdf