This study looked at how much carbon is stored and how fast forests in China's national parks are absorbing carbon over time. Using a special computer model, researchers found that national parks in China store a lot of carbon, more than the average forest in the country. By 2017, these parks held 3.56 billion tons of carbon, around 11-12% of all carbon stored in China's forests. Every year, the parks soak up 0.45 tons of carbon per hectare, with some regions doing especially well at storing carbon in the soil or trees. Overall, the national parks cover only a small area of China's forests but play a vital role in soaking up carbon from the air — a key part of managing greenhouse gases and fighting climate change.