Aside from the general anti-China slant that is fairly common in the journal
To be fair, the perceived anti-China slant wasn't always that way. It used to be one of the most pro-China publications in the early days of the Chinese economic ramp-up. But as things have changed in China, so has the tone of the Journal.
It's a reaction to what's happening there. An over-reaction, probably. But a reaction, nonetheless.