https://www.google.com.hk/search?q=new+steel+ladder+for+Village+on+cliff+in+China+builds+steel+ladder&biw=1920&bih=985&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiTjKTy27vQAhVGUbwKHe0fCjsQsAQIGA#imgrc=5ssVNNg4OOsSLM%3A
The authority should just move the people down to the valley.