# http://www.testpm.com/a/1.html ==> http://www.testpm.com/b/2.html
location /a/1.html {
	# http://ip/a/1.html =>  http://ip/b/2.html
	rewrite .* /b/2.html last; # 如果后面的路径没有加http开头，则表示本站的路径, flag 没有写默认是last
}

location /b {
	root /usr/share/nginx/html;
}