US President Donald Trump on Monday urged China to maintain tight control of its border with North Korea until he signs a denuclearization deal with Kim Jong UN .
Trump is scheduled to hold a landmark summit with the North Korean leader June 12 in Singapore , but Pyongyang recently has threatened to pull out over US demands for “unilateral nuclear abandonment . ”
“China must continue to be strong & tight on the Border of North Korea until a deal is made ,” Trump tweeted , suggesting China may have eased up on enforcing economic sanctions against Pyongyang .
“The word is that recently the Border has become much more porous and more has been filtering in .”, he wrote , adding he wants North Korea to be ‘VERY successful ,’ but only once a deal has been reached on denuclearization ,” he said .
China is North Korea ’s biggest trade partner , and Trump has called on it repeatedly to press Pyongyang to rein in its nuclear and missile programs