How violent is the price increase of raw materials

Listed companies in the upstream of raw materials continue to announce price increases. On March 10, Lomon Baili (28.000, -3.10, -9.97%) announced that the price of the company's titanium dioxide will increase by 1,000 yuan/ton from now on. Prior to March 3, China Nuclear Titanium Dioxide (9.220, -0.58, -5.92%), Anada (10.290, -0.70, -6.37%), Huiyun Titanium (17.400, -0.90, -4.92%) on the same day A price increase announcement was issued to increase the titanium dioxide by 1,000 yuan/ton, 1,000 yuan/ton, and 1,200 yuan/ton respectively. These companies have all raised prices 2-3 times during the year.