Soldiers drive past Taipei port as part of a drill stimulating the counter of a Chinese invasion, for the upcoming annual "Han Kuang" military exercises in Taipei city, Taiwan, July 21, 2022. REUTERS/Ann Wang

A shop owner sits at his closed shop during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A woman on a motorbike is asked to take cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

Police patrols the streets during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A general view of an empty street during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

People wait at the metro exit during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

Police patrols the streets during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A person waits in the backstreet during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A man runs to find a cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

Soldiers prepare the military tanks parked at a factory lot for the upcoming annual "Han Kuang" military exercises in New Taipei City, Taiwan, July 21, 2022. REUTERS/Ann Wang

A woman on a motorbike looks for a cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A man drives to find a cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

People leave the metro station after the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A police officer asks people to find cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

People wait indoors during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

A man runs to find a cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

Bus passengers are asked to find a cover during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

People wait indoors during the air-raid exercise named Wan An, an annual 30 min drill, a reminder of rising Chinese military threat, during which all vehicles are ordered to move to the sides of roads and pedestrians to wait in back streets in Taipei, Taiwan, July 25, 2022. REUTERS/Ann Wang

Military tanks parked at a factory lot for the upcoming annual "Han Kuang" military exercises in New Taipei City, Taiwan, July 21, 2022. REUTERS/Ann Wang

A woman takes photos of the military tanks parked at a factory lot for the upcoming annual "Han Kuang" military exercises in New Taipei City, Taiwan, July 21, 2022. REUTERS/Ann Wang