The stone bat with bark cloth, found in the Dawan culture around the estuary of Pearl River, is known to be the earliest and the most reliable material attached to the technique of back cloth in the Main Land of China.

• 环珠江口一带的大湾文化中发现的树皮布石拍是中国大陆目前所知唯一年代最早，可靠性最强的与树皮布技术相关的资料。