Yegor Chernev, a Ukrainian member of parliament of the Servant of the People Party and chairman of the Ukrainian delegation at the country's meeting with NATO, has been calling for volunteer troops from Poland, the U.S. and the UK to come to aid Ukraine. He said, "NATO, for now, is still the most effective alliance for us, for the security of our nation." CGTN's You Yang spoke with Chernev one on one.