Festive decorations for the holiday season are lit up in Vientiane, Laos, Dec. 23, 2019. (Photo: Xinhua)

People attend an illuminated float parade before Christmas in Sao Paulo, Brazil on Dec. 22, 2019. (Photo: Xinhua)

People attend an illuminated float parade before Christmas in Sao Paulo, Brazil on Dec. 22, 2019. (Photo: Xinhua)

People walk past decorated Christmas trees during the Journey to Christmas festival in central Moscow, Russia, on Dec. 22, 2019. From Dec. 13, 2019 to Jan. 12, 2020, illuminated installations decorate the holiday season among streets and squares in Moscow. (Photo: Xinhua)

People are seen by illuminated installations during the Journey to Christmas festival in central Moscow, Russia, on Dec. 22, 2019. From Dec. 13, 2019 to Jan. 12, 2020, illuminated installations decorate the holiday season among streets and squares in Moscow. (Photo: Xinhua)

People walk through illuminated installations during the Journey to Christmas festival in central Moscow, Russia, on Dec. 22, 2019. From Dec. 13, 2019 to Jan. 12, 2020, illuminated installations decorate the holiday season among streets and squares in Moscow. (Photo: Xinhua)

People take pictures in an illuminated installation during the Journey to Christmas festival in central Moscow, Russia, on Dec. 22, 2019. From Dec. 13, 2019 to Jan. 12, 2020, illuminated installations decorate the holiday season among streets and squares in Moscow. (Photo: Xinhua)

Syrians gather around a Christmas tree set up in the Mazzeh Highway west of Damascus, capital of Syria, on Dec. 22, 2019. An event was held Sunday around the Christmas tree, where a concert was given and people dressed as Santa Claus distributed candies for children. (Photo: Xinhua)

Syrians gather around a Christmas tree set up in the Mazzeh Highway west of Damascus, capital of Syria, on Dec. 22, 2019. An event was held Sunday around the Christmas tree, where a concert was given and people dressed as Santa Claus distributed candies for children. (Photo: Xinhua)

Syrians gather around a Christmas tree set up in the Mazzeh Highway west of Damascus, capital of Syria, on Dec. 22, 2019. An event was held Sunday around the Christmas tree, where a concert was given and people dressed as Santa Claus distributed candies for children. (Photo: Xinhua)

A woman dressed as Santa Claus distributes candies for a girl near a Christmas tree set up in the Mazzeh Highway west of Damascus, capital of Syria, on Dec. 22, 2019. An event was held Sunday around the Christmas tree, where a concert was given and people dressed as Santa Claus distributed candies for children. (Photo: Xinhua)

Photo taken on Dec. 21, 2019 shows illuminated installations during River of Lights at ABQ BioPark Botanic Garden in Albuquerque, New Mexico, the United States. The annual walk-through light show River of Lights, with millions of twinkling lights and nearly 600 dazzling holiday displays, stages here during the month of December. (Photo: Xinhua)

Photo taken on Dec. 21, 2019 shows an illuminated dinosaur during River of Lights at ABQ BioPark Botanic Garden in Albuquerque, New Mexico, the United States. The annual walk-through light show River of Lights, with millions of twinkling lights and nearly 600 dazzling holiday displays, stages here during the month of December. (Photo: Xinhua)

Photo taken on Dec. 21, 2019 shows illuminated installations during River of Lights at ABQ BioPark Botanic Garden in Albuquerque, New Mexico, the United States. The annual walk-through light show River of Lights, with millions of twinkling lights and nearly 600 dazzling holiday displays, stages here during the month of December. (Photo: Xinhua)

People stand near the Cafe Pushkin building during the Journey to Christmas festival in central Moscow, Russia, on Dec. 22, 2019. From Dec. 13, 2019 to Jan. 12, 2020, illuminated installations decorate the holiday season among streets and squares in Moscow. (Photo: Xinhua)

Christmas trees with cultural characteristics of different countries are displayed at the Museum of Science and Industry in Chicago, the United States, on Dec. 23, 2019. (Photo: Xinhua)

Girls view Christmas trees with cultural characteristics of different countries displayed at the Museum of Science and Industry in Chicago, the United States, on Dec. 23, 2019. (Photo: Xinhua)

People view Christmas trees with cultural characteristics of different countries displayed at the Museum of Science and Industry in Chicago, the United States, on Dec. 23, 2019. (Photo: Xinhua)

Giant inflatable Santa Clauses are seen during the Christmas season on Inglewood Drive in Toronto, Canada, Dec. 23, 2019. More than 60 inflatable 14-foot-high Santa Clauses stretched along Inglewood Drive during the holiday season. (Photo: Xinhua)

Festive decorations for the holiday season are lit up in Vientiane, Laos, Dec. 23, 2019. (Photo: Xinhua)