With all those excitement surrendering the recent "routine operations in international waters" according to Washington or "like a spy" according to Beijing, the recent warming of Sino-Vietnam relations seems to be overlooked. Both governments (and Republic of China as well) issued protests against Philippine’s recent Baseline Bill (Here). In their view, the bill upsets the 2002 ASEAN agreement on South China Sea Declaration on the Conduct.
Recent major Sino-Vietnam related events I am aware of:
They agreed to "properly handle South China Sea dispute" In January 2008 (Here)
Joint "survey of fishery resources and joint naval patrols" In June 2008 (Here)
Formed "a strategic cooperation pact between state-run China National Offshore Oil Corp and PetroVietnam" in Oct 2008 (Here)
Resolved of the 840miles of border dispute in Dec 2008 (Here)
To today’s shocker of (Here) "to advance the Vietnam-China comprehensive strategic and cooperative partnership" by Pham Quang Nghi. Not sure I know what is that statement means in real life and I do understand one has to be careful when reading government’s PR release. However, they seems to be friends, a major far cry from 30 years ago.