Trump's First Big Test

I believe the first big test Donald Trump will face will not be over immigrants, the wall, Syria or the dismantling of Obamacare. I believe the first big test will be in the Far East, and how he handles China's expansion in the South China Sea and how he handles North Korea. It looks to me like China is using North Korea as a fake, push there yet take more in the South while no-one is looking. Well they are looking and noticing but are otherwise occupied. Can Trump walk softly while carrying a big stick?