By Michelle Nichols UNITED NATIONS (Reuters) – China’s U.N. envoy said on Thursday that Beijing does not want to see North Korea carry out a new nuclear test, which is partly why China vetoed a U.S.-led bid to impose new U.N. sanctions on Pyongyang over renewed ballistic missiles launches. But Ambassador Zhang Jun warned against making presumptions on how Beijing might react at the United Nations if North Korea goes ahead with its first nuclear test since 2017. Washington has warned such a test could happen at “any time” and it would again push for more U.N. sanctions. “Let’s see what will hap…