China adopts a more hands-on approach to the conflict in South Sudan

China is swapping its reserved diplomacy for a hands-on approach to help resolve a five-month rebellion in South Sudan that threatens Beijing's oil investments.

The subtle change has been evident in months of faltering peace talks in the Ethiopian capital, where Chinese officials have been in regular contact with Western diplomats to help regional African mediators push for a halt to fighting.

Diplomats say the permanent Chinese presence at the Addis Ababa talks and their frequent lobby chats and closed-door consultations with diplomats from the United States, Britain and Norway - the main Western backers of newly independent South Sudan - show China's more proactive approach.

When a first ceasefire deal was reached on January 23, a month after fighting erupted, a senior Western diplomat said China's ambassador to Ethiopia, Xie Xiaoyan, gave a speech at the signing that set the tone for Beijing's involvement.

"What's very striking is that he was given the floor and did not vary one bit from what everyone else was saying, which was basically telling the South Sudanese factions to 'get your act together'," the diplomat said.

The new line does not mean China plans to abandon its oft stated policy of steering clear of Africa's internal politics, but it is an indication of a gradual shift by Beijing as its stake in Africa's stability grows with expanding investments.