This report from BBC NEWS suggests that the new leadership in China is more circumspect in its dealings with Pakistan.
It is certain that China sees itself as a strategic rival of the United States, but it is less certain if China sees continuing its alliance with the likes of North Korea and Pakistan will allow it to grab a key position in the international mainstream. To gets its fair position in the comity of nations, China must accept its responsibilities. The fact that it is playing a more responsible role in the North Korean crisis is a good step in this direction.
This does not mean China will jettison Pakistan as easily. China needs access to the Indian Ocean; hence its interests in developing Gwadar in Pakistan (accessed via the Karakoram Highway), and Myanmar.