Not long after North Korea's latest missile test, China announced it won't be importing any more coal from its neighbor this year.
The communist nation is one of North Korea's only powerful allies. But China started to change its tune in late 2016 when it supported "the toughest and most comprehensive sanctions" against North Korea.
Reducing coal exports is part of the sanctions passed in November. But experts told the Washington Post recent events, like the missile test and suspicions that Kim Jong-un had his half brother killed, could be why China is enforcing those sanctions now.
The missile tested earlier this month was aimed at Japan. It landed in the Sea of Japan, but North Korean officials called the test a success.
Kim Jong-nam, the half brother of North Korea's dictator, died mysteriously in Malaysia on Feb. 13. North Korea says his cause of death was a heart attack, but international media has called it an assassination.
China has a history of protecting Kim Jong-nam, and experts told the Washington Post China would see it as an insult if it turns out North Korea ordered his death.