On September 9th, the welfare day，Tianrui Ou has supported the “Big City and Small Love” welfare activity. He appealed to fans to pay attention to the country child’s education and convey the education power to them. As an idol, Tianrui Ou expressed his model attitude by conveying the positive energy. Later, many fans have all participated in the activity and contributed the effort with Tianrui Ou towards the children from the mountains.