支床叠屋

Explanation: Still redundant. Yu repeat. 　　Source: Liang, "China's old history," the "Annals of twenty slightly" to the main thesis to account, giving the real history of industry in China also put a light. Pity that it is trapped by the scope of Tai Shi Gong, Chi Chuan of ten to seven, eight, filling the book, support redundancy for the general blemish. "