Do you play Ant Forest? It is an online game on Alipay. Players collect "energy" by (do) something environmentally friendly. They can grow and water（they） own "trees" with the "energy", When the "trees" are much ( big). Alipay with some other companies will plant real trees in the desert area of China. Every year millions of trees (plant) in this way.
This is part of China's tree planting program. It hopes to stop the desertbecoming large. Since 1978, China has planted over 66 billion trees in the north. It is known for "the Great Green Wall". For example, Saihanba in Hebei Province was (one）a desert, but now it (become)one of the biggest man-made forests in China. It (great) surprised the whole world.
"China is making the world much greenerbefore. It sets a good example and has many(lesson) to share with the world ", said the United Nations Environment Program.
