April 21st News: On April 21st, the quoted price for Henan Kaijie's nut shell activated carbon with an iodine value of 300 is 4,800 yuan per ton, while the quoted price for coal-based tar columnar activated carbon is 13,000 yuan per ton, reflecting an increase of 20 yuan per ton. Currently, the monthly production capacity of activated carbon stands at 300 tons.