President Joe Biden will sit down with South Korean President Moon Jae-in Friday amid relative calm on the Korean Peninsula. But their first meeting arrives with questions about Korea’s willingness to play a stronger deterrent role against China.

Former President Donald Trump unilaterally scaled back or canceled joint military exercises between the United States and South Korea in a gesture to North Korea that yielded no progress in his failed denuclearization push, experts say. Meanwhile, Moon is expected to seek Biden’s support for a peace declaration to end the Korean War officially. While other allies, such as Japan, have taken a tough stance against Chinese aggression, South Korea is still reticent.