Sad to say, but Russia and China will have to stabilize the situation in the Middle East, if it is to be stabilized at all. From Federico Pieraccini at strategic-culture.org:
The murder of Iranian general Qasem Soleimani in Baghdad, in the early hours of January 3 by US forces, only highlights the extent to which US strategy in the Middle East has failed. It is likely to provoke reactions that do not benefit US interests in the region.
To understand the significance of this event, it is necessary to quickly reconstruct the developments in Iraq. The US has occupied Iraq for 17 years, following its invasion of the country in 2003. During this time, Baghdad and Tehran have re-established ties by sustaining an important dialogue on post-war reconstruction as well as by acknowledging the importance of the Shia population in Iraq.
Within two decades, Iraq and Iran have gone from declaring war with each other to cooperating on the so-called Shia Crescent, favoring cooperation and the commercial and military development of the quartet composed of Iran, Iraq, Syria and Lebanon. Such ties, following recent victories over international terrorism, have been further consolidated, leading to current and planned overland connections between this quartet.