Ukrainian President Volodymyr Zelensky on Sunday accused China of attempting to undermine a peace conference planned for later this month in Switzerland. Speaking during the Shangri-La Dialogue security event in Singapore, Zelensky said that China, by contrast with the United States, was working to ensure “that countries do not take part in the peace summit,” Ukrainian media reported. Russia has not been invited to the conference to be held at Bürgenstock near Lucerne on June 15 and 16, and China has indicated that it will not attend. In a previous address to the event, Zelensky said that ther…