Spectacular night view of Yanqi Lake in Beijing

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]

A spectacular view of Yanqi Lake in Beijing's northeastern district of Huairou, which is located at the foot of the Great Wall. The lake has been illuminated as part of a test run in preparation for the Belt and Road Forum for International Cooperation which will be held in Beijing on May 14-15. [Photo provided by Chen Xianjun to China Plus]