![Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/16/64665a57b92a48bfaf6ab0103c73ffb6.jpg)
Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)
![Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/16/a1a69261e886474994f89714d76e8fe8.jpg)
Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)
![Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/16/c6d89f85b337416e9f0591b4079a9d98.jpg)
Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)
![Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/16/b4dcaeb9ee244ea69d7ad785be92b323.jpg)
Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)
![Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/11/16/1586ed2e144643829c1605976976fa87.jpg)
Visitors walk along illuminated objects during the Christmas Garden event at a botanic garden in Berlin, Germany, November 15, 2018. (Photo/Agencies)