Not sure where you got that.  I stated:

"Not much ties to Iran in that group. Lots of ties to Saudi Arabia."  when I was referring to the 9/11 attacks on the U.S.  I was saying that the countries you mention, as being huge sources of terrorism, were nothing of the sort when it came to the biggest terrorist attack on U.S. soil.

Russia no doubt has close ties to Iran and Syria.  Seems like the Russians see value in harsh dictators maintaining control of the numerous warring factions in the middle east.  Can't say I see much Chinese interest in the middle east other than their western border (rightfully so).  China seems more focused on Africa to expand their international relationships.  My understanding is they've been moving in with industry to gain advantage of even lower wage labor, but in turn they're providing jobs and bringing in money to those regions.  China's relationship with Russia is not what I'd call "close".