EU is just setting a trap for China. The issue is not between Ukraine and Russia. It is between US/NATO and Russia. There is no need for a mediator, nor anybody capable to mediate. EU is not asking for a mediator but a human shield for NATO aggression.
"China Must Mediate Ukraine-Russia War: EU's Borrell"
"China should mediate future peace talks between Russia and Ukraine as Western powers cannot fulfil the role,
the European Union's foreign policy chief Josep Borrell said."
""There is no alternative... It must be China, I am sure of that," Borrell said in an interview with Spanish daily El Mundo
published on Friday evening.
"Diplomacy cannot only be European or American. Chinese diplomacy has a role to play here," he added.
"We have not asked for it and neither have they (China), but since it has to be a power and neither the US nor Europe
can be (mediators), China could be."
Ukraine may trust that China has enough leverage with Russia to insure that Russia abides by any agreement.
China will stay out of it until NATO acknowledge the Russian security concern. The Chinese representative to EU has made that clear.