The NPRK agrees to denuclearize the peninsula but is return for that and for China's backing and support the USA gives into China's one side trade, not normalize trade and address tariffs (which on their side averages 8%) and is responsible for the $400 annual trade deficit the USA has with them.
Nah ... North Korea & Chinas trade surplus with the US are separate issues. Trump is too savvy to allow the two to become entangled.