SEOUL-- U.S. President Donald Trump said Thursday that China's special envoy to North Korea appears to have had "no impact" on reining in North Korea after the country fired a new long-range missile a day earlier.

"The Chinese envoy, who just returned from North Korea, seems to have had no impact on Little Rocket Man," Trump wrote on Twitter, referring to North Korean leader Kim Jong-un.

North Korea fired a Hwasong-15 intercontinental ballistic missile (ICBM), which it claims is capable of carrying a "super-large heavy warhead" and putting the whole mainland of the U.S. within its range.

"Hard to believe his people, and the military, put up with living in such horrible conditions," Trump said. "Russia and China condemned the launch."

The missile test came about two weeks after Song Tao, the special envoy of Chinese President Xi Jinping, visited North Korea amid frayed ties over Pyongyang's nuclear and missile programs.

Song came back home without being able to meet with the North's leader amid reports that he rejected North Korea's request to ease sanctions on Pyongyang.

Following the missile test, Trump vowed to impose "additional major sanctions" on Pyongyang.

Source: Yonhap News Agency