Hsinchu sieve should be oiled. Bamboo products should be maintained with tung oil. Tung oil can protect the internal fibers of bamboo products, and the surface effect after drying is like paint. Tung oil is an excellent dry vegetable oil, which has the characteristics of fast drying, light specific gravity, good luster, strong adhesion, heat resistance, acid resistance, alkali resistance, corrosion resistance, rust prevention and non-conductivity, and is widely used.