Great commentary regarding the Chinese Viewpoint!:
Commentary: Iran Nuclear Talks Offer Precious Chance to Rebuild Trust
2012-04-13 Xinhua
Web Editor:Zhangjin
by Wang Haiqing
...The whole world would have to pay an even heavier price should the Strait of Hormuz, the route for about a fifth of the world's oil, be closed, as Iran has repeatedly threatened to do. Any extreme move in this regard violates the right of free passage through international waters and is against the common desire of the international community.
Commentary: Iran Nuclear Talks Offer Precious Chance to Rebuild Trust
China's interest is energy only. China's economy depends on middle east oil from Iran and every other oil state in the region. They can't take sides. Their interest is stability and access to oil. Likely they'd intervene militarily to prevent a disruption to their oil supply. An oil crisis would collapse their economy and possibly create social upheaval or revolution.
Speaking of trust... I doubt Iran can trust the 5+1 or UN weapon inspectors. Iran claims they can prove that intel gleaned from UN Inspection reports were to murder Iranian scientists and sabotage Iranian military and industrial facilities...
Iran nuclear talks: Why the trust gap is so great
Part of the reason for Iran's distrust lies in the CIA's infiltration of a UN weapons inspection team in Iraq in the 1990s
The Islamic Republic has been targeted by an escalating covert war, widely attributed to the United States and Israel and their proxies. That war has included the assassination of Iranian nuclear scientists, the Stuxnet computer virus, American CIA spy drone flights deep into Iranian airspace, and a host of unexplained explosions and acts of espionage...
Iran nuclear talks: Why the trust gap is so great - CSMonitor.com
Most Americans and Canadians haven't a clue about these overt acts of war. Instead most have a manipulated perception that Iran has an active nuclear weapons program, despite the fact that both Israeli and American intelligence services both report Iran does not have an active nuclear weapon program...
War Propaganda's Triumph: U.S. Public Opinion on Iran
Iran would be completely justified in blocking UN Inspectors. Many Iranians have died as consequence of allowing inspections. Currently most Iranians oppose building nuclear weapons and support their government's peaceful nuclear program. If Israel or the US attacked Iran, I suspect more Iranians would support building nukes...