How to Change Option's name?

Grafana
1

How to change the names like “reachable.elapsed {name: WuHan}” to other name ,e.g.“Wuhan” ?
Thanks !

%E6%B7%B1%E5%BA%A6%E6%88%AA%E5%9B%BE_%E9%80%89%E6%8B%A9%E5%8C%BA%E5%9F%9F_20180726193716
%E6%B7%B1%E5%BA%A6%E6%88%AA%E5%9B%BE_%E9%80%89%E6%8B%A9%E5%8C%BA%E5%9F%9F_20180726193716875×396 49.6 KB