Remembering two of country's fallen heroes

On July 10, a mortar shell struck a street in Juba, the capital of South Sudan. The explosion ripped through an armored vehicle guarding a refugee camp near a United Nations compound. Two Chinese peacekeepers, Li Lei, 22, and Yang Shupeng, 33, were killed, and five others were injured.

Two months later, it is still hard for some to let go.

One evening during roll call in the regiment where Li was trained, the commander called Li Lei's name and nearly 110 soldiers responded.