In 2021, Chang established three solar power stations for the Ruifu Education Center in Tainan in collaboration with Tainan Mayor Huang Wei-che, Taiju Group Chairman Wu Yigui, and National Cheng Kung University President Su Huizhen, and installed power-saving LED lights in 32 schools in Pianxiang township as part of a “green energy for public welfare” model to provide social welfare organizations with reduced costs and sustainable growth.