China expresses concerns over North Korean troops' presence on Russian front lines, amid escalating tensions in the region. The move is seen as a potential threat to regional stability and could impact global security. Russia has maintained diplomatic relations with North Korea, while China has sought to maintain a delicate balance between its relationships with both countries.

Source: https://www.ft.com/content/67faab64-6b56-41f8-917d-647f842f0705