An exhibitor wearing a face mask sanitizes his hands at the European Bridal Week trade fair in Essen, Germany, July 5, 2020. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures. (Photos: Xinhua)

Visitors watch a model presenting a wedding dress at the European Bridal Week trade fair in Essen, Germany, July 5, 2020. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures.

A model wearing a face mask presents a wedding dress at the European Bridal Week trade fair in Essen, Germany, July 5, 2020. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures. (Photo by Tang Ying/Xinhua)

A model wearing a face mask presents a wedding dress at the European Bridal Week trade fair in Essen, Germany, July 5, 2020. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures.

A model wearing a face mask presents a wedding dress at the European Bridal Week trade fair in Essen, Germany, July 5, 2020. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures.

Photo taken on July 5, 2020 shows a general view of the European Bridal Week trade fair in Essen, Germany. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures.

A sign reminding people to observe social distancing is seen at the European Bridal Week trade fair in Essen, Germany, July 5, 2020. The European Bridal Week, an international bridal trade fair, is held here from July 4 to 6 with strict COVID-19 control and prevention measures.