Kyiv (AFP) – Ukraine called on China on Saturday to join the West in condemning “Russian barbarism”, as Moscow claimed it had struck a Ukrainian arms depot with hypersonic missiles in what would be the first use in combat of the next-generation weapons. That attack, not far from the country’s western Romanian border, came as Russia said its troops had broken through Ukrainian defences to enter the besieged southern port city of Mariupol, a scene of mounting desperation. With the invasion in its fourth week, Kyiv’s embattled leader Volodymyr Zelensky pressed for “meaningful” talks to halt fight…