The Trump administration is reportedly considering using financial penalties to punish China, according to U.S. officials.

The president’s advisers are crafting a plan which could involve trade restrictions and economic sanctions, two administration officials revealed to Politico. President Donald Trump has grown increasingly frustrated with China’s inability to resolve the crisis on the Korean Peninsula.

Trump repeatedly criticized China on the campaign trail, attacking Beijing for its trade practices, but when he met Chinese President Xi Jinping at Mar-a-Lago in April, he offered better trade relations in exchange for China’s help with North Korea.

China has so far failed to put real pressure on North Korea, which has demonstrated the ability to strike targets in the U.S. North Korea has twice tested its new Hwasong-14 intercontinental ballistic missile, which experts assess can hit targets as far away as Chicago, possibly even farther.