When China’s foreign minister Wang Yi held his annual extended press conference on the sidelines of the Two Sessions this week, there was one pressing question: what will China do about Russia and Ukraine? SCMP’s Beijing-based reporter Shi Jiangtao analyses Wang’s comments on Ukraine and Russia as well as what his words revealed about Beijing's policy for the EU, India, South Korea and Japan, amid growing international calls for Beijing to step in to end the worsening humanitarian crisis in…