The city will test its siren alarm for air defense between 10:40 a.m. and 11 a.m. Saturday, according to a public notice by the city government.

The 20-minute test will be sequenced in three stages: early warning, raid alarm and alarm cancellation. Each alarm will last three minutes. The intervals between the three alarms will be seven minutes and four minutes.

Residents' daily life and business will not be interrupted during the test period. For more details, please contact the information center of city's civil defense by calling 88120262.