On February 12 the NYT claimed that North Korea's Nuclear Test Poses Big Challenge to China’s New Leader. It set off with a false choice:
The nuclear test by North Korea on Tuesday, in defiance of warnings by China, leaves the new Chinese leader, Xi Jinping, with a choice: Does he upset North Korea just a bit by agreeing to stepped up United Nations sanctions, or does he rattle the regime by pulling the plug on infusions of Chinese oil and investments that keep North Korea afloat?
I rejected the speculations in that piece and explained that while China might join some mild UN sanctions, as it later did, it has no interest in really pressing North Korea:
China needs North Korea as a buffer against U.S. troops at its borders. It will not do anything to ruin North Korea as a chaotic and dissolving neighbor would be a huge security problem for Beijing.
As nothing in those circumstances changed, I reasoned, China's policy on North Korea would not change.
Now China is saying exactly that:
China’s foreign minister said Saturday that Beijing would not abandon North Korea, reiterating China’s longstanding position that dialogue, not sanctions, is the best way to persuade the North to abandon its nuclear weapons.
At a news conference during the National People’s Congress, the foreign minister, Yang Jiechi, suggested that Chinese support for tougher United Nations sanctions against North Korea should not be interpreted as a basic change in China’s attitude.
China has always seen North Korea as a buffer zone and it will continue to do so as long as needed. Besides that it also likes the coal and iron ore it imports from North Korea at favorable prices. Even if North Korea again starts some clashes with South Korea, as it seems likely to do soon, China will not overtly interfere unless North Korea's existence in endangered.
The permanent speculation of a "western" turn of China's policies is nonsense. China has its own interests, often divert from "western" ones, and China is capable of pursuing its interests with its own policies.