Since the outbreak of the COVID-19 in 2020, the prices of coal and oil have risen sharply, resulting in the price of asphalt, modifiers and other raw materials, as well as the cost of waterproof materials. In this context, how does PENNINT deal with the uncontrollable and unchangeable situation that

Since the outbreak of the COVID-19 in 2020, the prices of coal and oil have risen sharply, resulting in the price of asphalt, modifiers and other raw materials, as well as the cost of waterproof materials. In this context, how does PENNINT deal with the uncontrollable and unchangeable situation that

Since the outbreak of the COVID-19 in 2020, the prices of coal and oil have risen sharply, resulting in the price of asphalt, modifiers and other raw materials, as well as the cost of waterproof materials. In this context, how does PENNINT deal with the uncontrollable and unchangeable situation that