President-elect Donald Trump's meeting with Alibaba founder and executive chairman Jack Ma on Monday was brilliant — but not for the obvious reason of making him look good for being part of a conversation about creating 1 million jobs. What's really smart about it is that puts China on its heels. Trump and Beijing have been engaged in a back-and-forth rattling of sabers from the minute Trump won the election. Remember that Trump took a congratulatory call from Taiwan's president and on the same day Trump met with Ma, a state-run Chinese tabloid warned that China would "take revenge" if...