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Visitors look at a lighting installation in the old town of Lucerne, Switzerland, Jan. 18, 2019. The 1st Light Festival Lucerne was held in Lucerne from Jan. 10 to 20, 2019. (Xinhua/Michele Limina)
Visitors look at a lighting installation in the old town of Lucerne, Switzerland, Jan. 18, 2019. The 1st Light Festival Lucerne was held in Lucerne from Jan. 10 to 20, 2019. (Xinhua/Michele Limina)