A light sculpture is seen during the Chinese Lights Festival at the Warsaw Fortress in Warsaw, Poland, Nov. 29, 2019. The Chinese Lights Festival is exhibited for the first time in Poland, attracting a great number of visitors. (Photo by Jaap Arriens/Xinhua)

A light sculpture of giant pandas is seen during the Chinese Lights Festival at the Warsaw Fortress in Warsaw, Poland, Nov. 29, 2019. The Chinese Lights Festival is exhibited for the first time in Poland, attracting a great number of visitors. (Photo by Jaap Arriens/Xinhua)

A light sculpture is seen during the Chinese Lights Festival at the Warsaw Fortress in Warsaw, Poland, Nov. 29, 2019. The Chinese Lights Festival is exhibited for the first time in Poland, attracting a great number of visitors. (Photo by Jaap Arriens/Xinhua)

A light sculpture is seen during the Chinese Lights Festival at the Warsaw Fortress in Warsaw, Poland, Nov. 29, 2019. The Chinese Lights Festival is exhibited for the first time in Poland, attracting a great number of visitors. (Photo by Jaap Arriens/Xinhua)

A light sculpture is seen during the Chinese Lights Festival at the Warsaw Fortress in Warsaw, Poland, Nov. 29, 2019. The Chinese Lights Festival is exhibited for the first time in Poland, attracting a great number of visitors. (Photo by Jaap Arriens/Xinhua)