As he points out, knotted gourds were produced in the early Qing period, and the Japanese had also succeeded at that same process.
龔一舫指出，早在清朝時期，就有瓠瓜「打結」的作品，多年前，日本葫蘆協會也有會員將長柄瓠成功「打結」的實例，不但趣味十足，更增加收藏價值，這也激發他著手嘗試的念頭。