President Xi Jinping and his wife, Peng Liyuan, center, have a group photo with delegates and guests before the welcome banquet for the Belt and Road Forum for International Cooperation at the Great Hall of the People in Beijing on Sunday. (Wu Zhiyi / China Daily)

Delegates and guests arrive at the welcome banquet held at the Great Hall of the People. (Xu Jingxing / China Daily)

German Minister for Economic Affairs and Energy Brigitte Zypries, center, attends the Plenary Session of High-Level Dialogue on the Belt and Road Forum for International Cooperation on Sunday. (Zou Hong / China Daily)

A staff member displays commemorative stamps and envelopes at the China National Convention Center on Sunday. (Zou Hong / China Daily)

The opening ceremony of the Belt and Road Forum for International Cooperation is held in the National Convention Center in Beijing on May 14, 2017. (Photo by Xu Jingxing / chinadaily.com.cn)