About half the size of a palm, there is a wooden beam or bamboo beam in the middle, and there are many wooden teeth or bamboo teeth on both sides. This is called a grate (bi), also called a grate dustpan. It is a tool for combing hair like a wooden comb, which has a history of 6000 years.

Twenty years ago, grate was almost a necessity for every family, because it could remove dandruff and lice that were common in people's hair at that time; Now, even in the remote rural areas of western Zhejiang, due to the popularity of shampoo such as Head & Shoulders and the improvement of sanitary conditions, it has completely withdrawn from the market. Accompanied by this, it gradually disappeared into the living habits of Zhejiang people, and thimbles for sewing clothes appeared.

The fireplace disappeared from the dresser.

In recent days, Xindida Beauty Salon Company, located in Zhongshan North Road, Hangzhou, is selling hairdressing products at a discount. Among them, a kind of "fork comb" with sparse teeth will be eliminated from the company's commodity ranks after this discount. Miss Zhu of the company said that more than ten years ago, before the fork comb, it was impossible to sell leaky spoons in Hangzhou. Manufacturers know more about the sales of perforated strainer. Mr. Wang, the head of Xiyang Yingen Wood Comb Factory in Jingxian County, Anhui Province, said that in the last year and a half, the factory has not sold a comb to Zhejiang, or even produced a comb, which is a common phenomenon among comb manufacturers in Jingxian County.

Jingxian County, Anhui Province is the largest production base of wooden combs in China, with an annual output of 70 million wooden combs, accounting for 65% of the national total. Xiyang Yingen Comb Factory in Jingxian County, Anhui Province, with an annual output of 6 million combs, is a local factory. Mr. Wang explained that the production process of combs is too complicated, with nearly 30 production processes, 7 more than ordinary combs, and the profit is not as high as other combs. "What's more, nobody wants a grate."

Mr. Wang said that they have been producing grates since 1987 was opened, and the annual output reached 40,000-50,000 units in previous years. But since 2002, it is obvious that colander can't be sold, and they only produce it when there is an order. In the last year and a half, because the production process has been adjusted to high-grade combs, even if there is an order, it will not be produced.