Sudan said meanwhile that it and South Sudan agreed meanwhile during a visit to Juba by Sudanese President Omar al-Bashir to consider setting up a joint force to protect vital oilfields.
Ethiopian government spokesman Getachew Reda, whose government has spent days trying to get the two sides into the same room, told AFP that formal negotiations on a possible ceasefire had finally started in an Addis Ababa luxury hotel -- even as fighting continued to rage back in South Sudan.
"China is a permanent member of the United Nations Security Council, so we are paying close attention to the evolving situation in South Sudan," Wang told reporters.
"We have been making mediation efforts, and the Chinese government special representative for African affairs is visiting the region and has had meetings with both sides," he said, offering to personally "directly engage" with the two sides while in Addis Ababa.
Sudan's foreign minister Ali Ahmed Karti also said the two are "in consultations about the deployment of a mixed force to protect the oilfields in the South."
But fighting has continued to rage, with both sides vowing to step up their offensives across the country -- which has been teetering on the brink of all-out civil war less than three years after gaining independence from Khartoum.
The conflict in South Sudan erupted on December 15, pitting army units loyal to Kiir against a loose alliance of ethnic militia forces and mutinous army commanders nominally headed by Riek Machar, a former vice president who was sacked last July.
