Five years. The lighting project beautifies the buildings in the urban area through lighting art, so that different colors of light can illuminate the buildings. Sichuan Guangyuan lighting project has a bright future and will last for five years. Guangyuan City is a prefecture-level city under the jurisdiction of Sichuan Province, bordering Gansu Province and Shaanxi Province in the north. Nanchong city in the south; It is connected with Mianyang City in the west; It borders Bazhong City in the east.