Soldiers take part in the "Dragon Gold 2020" joint drill in Cambodia's southwestern Kampot province, March 24, 2020. Cambodia and China launched the fourth joint drill on counter-terrorism and humanitarian rescue at the Techo Sen Chumkiri live-fire field in Cambodia's southwestern Kampot province on March 15. The exercise dubbed "Dragon Gold 2020" will last till April 1. [Photo/Xinhua]

Soldiers take part in the "Dragon Gold 2020" joint drill in Cambodia's southwestern Kampot province, March 24, 2020. Cambodia and China launched the fourth joint drill on counter-terrorism and humanitarian rescue at the Techo Sen Chumkiri live-fire field in Cambodia's southwestern Kampot province on March 15. The exercise dubbed "Dragon Gold 2020" will last till April 1. [Photo/Xinhua]

Soldiers take part in the "Dragon Gold 2020" joint drill in Cambodia's southwestern Kampot province, March 24, 2020. Cambodia and China launched the fourth joint drill on counter-terrorism and humanitarian rescue at the Techo Sen Chumkiri live-fire field in Cambodia's southwestern Kampot province on March 15. The exercise dubbed "Dragon Gold 2020" will last till April 1. [Photo/Xinhua]

Soldiers take part in the "Dragon Gold 2020" joint drill in Cambodia's southwestern Kampot province, March 24, 2020. Cambodia and China launched the fourth joint drill on counter-terrorism and humanitarian rescue at the Techo Sen Chumkiri live-fire field in Cambodia's southwestern Kampot province on March 15. The exercise dubbed "Dragon Gold 2020" will last till April 1. [Photo/Xinhua]

Soldiers take part in the "Dragon Gold 2020" joint drill in Cambodia's southwestern Kampot province, March 24, 2020. Cambodia and China launched the fourth joint drill on counter-terrorism and humanitarian rescue at the Techo Sen Chumkiri live-fire field in Cambodia's southwestern Kampot province on March 15. The exercise dubbed "Dragon Gold 2020" will last till April 1. [Photo/Xinhua]

Soldiers take part in the "Dragon Gold 2020" joint drill in Cambodia's southwestern Kampot province, March 24, 2020. Cambodia and China launched the fourth joint drill on counter-terrorism and humanitarian rescue at the Techo Sen Chumkiri live-fire field in Cambodia's southwestern Kampot province on March 15. The exercise dubbed "Dragon Gold 2020" will last till April 1. [Photo/Xinhua]