NIP mining machine: Decreasing ore grade year by year will increase the size of the spare parts market, benefiting the company's development. NIP mining machine recently stated at an earnings briefing that 70% of the company's products are currently used in copper mines. Taking copper mines as an example, due to the long mining period, the global copper ore grade is gradually declining. The decrease in ore grade means a reduction in the amount of metal copper that can be obtained per unit of ore, and it will also result in a higher difficulty in grinding the ore. Mining companies can only maintain production growth by opening new mines, increasing the consumption of beneficiation spare parts to improve the efficiency of beneficiation equipment, etc. Therefore, the consumption of wear-resistant spare parts will increase. Therefore, with the gradual decline in ore grade, the market size of spare parts will increase, which is beneficial for the company's development.