Original sentence: French windows of shops, including McDonald's in Sun Hung Kai Centre, which is close to the Wan Chai Sports Ground protest zone, have been surrounded by wire nettings.However, on December 17, the Hong Kong Police Force used tear gas, pepper spray and water cannons in order to surpress the demonstrators.Protesters broke through many police lines.To stop protesters, fences around the Hong Kong Convention and Exhibition Centre have been erected
Edited sentence: French windows of shops, including McDonald's in Sun Hung Kai Centre, which is close to the Wan Chai Sports Ground protest zone, have been protected by wire nettings.However, on December 17, the Hong Kong Police Force used tear gas, pepper spray and water cannons in order to surpress the demonstrators, and the number of the police force was much higher than the number the demonstrators.To minimize damage from possible confrontations, fences around the Hong Kong Convention and Exhibition Centre have been erected.To prepare for possible demonstrations turning violent during the conference, the police force has cancelled all long vacations