My family lives in the five floor of a six-storey building.There are many old mans living in it. One day I found that the lights in the three and five floor had been wrong. These two lights are in the public corridor. It is dangerous for the elderly to go downstars on the evening. So I asked my parents for a help and replaced them at once . After solving this problem,I am very glad to see these lights are shining at night .It’s useful for the old man in case of any unexpected accident. Menwhiile I hope these lights will illuminate the wisdom of native inhabitants in their heart. They will have access to the Buddha dharma in the future. Amitabha!