On December 4th, participants visited the China Pavilion of the United Nations Convention to Combat Desertification in Riyadh, Saudi Arabia. The China Pavilion of the United Nations Convention to Combat Desertification, with a total area of more than 600 square meters, is the largest national theme pavilion besides the host country. It holds an exhibition on the theme of "China's Practice in the New Era of the Three North Cross Century Project" to show the effectiveness and experience of China's desertification control represented by the "Three North" project, tell the story of the Chinese people's hard work and long achievements in desertification control, and carry out a series of side meetings. (New Society)