WETHMAY, Myanmar—Anger over plans to expand a Chinese-backed mine near here is emerging as a test case of Myanmar?s recent political reforms. Villagers have staged raucous protests in recent weeks over the giant copper mine near Monywa in northwestern Myanmar, owned jointly by Myanmar?s military and a subsidiary of China North Industries Corp., an arms manufacturer. The subsidiary, Wanbao Mining Ltd., and its Myanmar partners are hoping to expand the mine, but that would require taking over huge tracts of land and moving as many as 26 villages, locals say..."