Chinese Ambassador to Myanmar Yang Houlan lays a wreath at the Cemetery of the Chinese Expeditionary Army in Toungoo, Myanmar, on April 4, 2014, ahead of China's traditional Qingming Festival, or Tomb-sweeping Day. (Xinhua/Zhang Yunfei)

Overseas Chinese lays a wreath at the Cemetery of the Chinese Expeditionary Army in Toungoo, Myanmar, on April 4, 2014, ahead of China's traditional Qingming Festival, or Tomb-sweeping Day. (Xinhua/Zhang Yunfei)

Members of the Chinese Embassy and institutions in Myanmar stand in silent tribute at the Cemetery of the Chinese Expeditionary Army in Toungoo, Myanmar, on April 4, 2014, ahead of China's traditional Qingming Festival, or Tomb-sweeping Day. (Xinhua/Zhang Yunfei)

Wreaths are seen at the Cemetery of the Chinese Expeditionary Army in Toungoo, Myanmar, on April 4, 2014, ahead of China's traditional Qingming Festival, or Tomb-sweeping Day. (Xinhua/Zhang Yunfei)

Members of the Chinese Embassy and institutions in Myanmar take part in a memorial ceremony at the Cemetery of the Chinese Expeditionary Army in Toungoo, Myanmar, on April 4, 2014, ahead of China's traditional Qingming Festival, or Tomb-sweeping Day. (Xinhua/Zhang Yunfei)

Overseas Chinese take part in a memorial ceremony at the Cemetery of the Chinese Expeditionary Army in Toungoo, Myanmar, on April 4, 2014, ahead of China's traditional Qingming Festival, or Tomb-sweeping Day. (Xinhua/Zhang Yunfei)