He's pretty good for a person who has had a lifelong speech impediment and had to receive intensive therapy as a young person.
Xi will not be so stupid. He's gone there to persuade Putin to accept a political settlement acceptable to the west. China's trade is minuscule compare to that with the US and western allies against Russia.
China has warned Russia never to do this, so has India. Putin will only do this if he knows his number is up and the grim reaper has arrived at his door. At that time his Generals will off him. Russia wants to be a world player, not an ash tray. The mantra that the west should surrender to Russia because he might press the red button is getting tired now.