Here is the quote from the article, indicating that China has pressured NK into submission with threats of serious economic consequences, (unlike those the U.S. signed on for with the U.N.).
"China is viewed as a key nation in efforts to 'persuade' the North to disarm, as it is the isolated communist nation's main trading partner.", (empahsis mine).
LOL ---
"China is viewed as a key nation in efforts to persuade the North to disarm ..."
translates into
"China has pressured NK into submission with threats .."
?