It seems that in Trump-Xi Summit in Florida, the US and China agreed to pressure the North Korea. This deal between two main powers even reversed Trump’s claim that “China is not a currency manipulator.”
The interesting thing is that, yesterday Russia vetoes UN statement on North Korea’s missile tests, which even China is in favor of. (http://www.cnn.com/2017/04/19/asia/russia-un-veto-north-korea/)