Fireworks light up the sky during the National Day Parade show at Singapore's Marina Bay, Aug. 21, 2021. Affected by the COVID-19 pandemic, Singapore's previous National Day Parade (NDP) celebrations held on Aug. 9 were postponed to Aug. 21. (Photos: Then Chih Wey/Xinhua)

Fighter planes fly in formation as part of an aerial performance during the National Day Parade show at Singapore's Marina Bay, Aug. 21, 2021. Affected by the COVID-19 pandemic, Singapore's previous National Day Parade (NDP) celebrations held on Aug. 9 were postponed to Aug. 21.

Fighter planes fly in formation as part of an aerial performance during the National Day Parade show at Singapore's Marina Bay, Aug. 21, 2021. Affected by the COVID-19 pandemic, Singapore's previous National Day Parade (NDP) celebrations held on Aug. 9 were postponed to Aug. 21.

Fireworks light up the sky during the National Day Parade show at Singapore's Marina Bay, Aug. 21, 2021. Affected by the COVID-19 pandemic, Singapore's previous National Day Parade (NDP) celebrations held on Aug. 9 were postponed to Aug. 21.

Helicopters fly with Singapore's national flag as part of an aerial performance during the National Day Parade show at Singapore's Marina Bay, Aug. 21, 2021. Affected by the COVID-19 pandemic, Singapore's previous National Day Parade (NDP) celebrations held on Aug. 9 were postponed to Aug. 21.

A fighter plane flies as part of an aerial performance during the National Day Parade show at Singapore's Marina Bay, Aug. 21, 2021. Affected by the COVID-19 pandemic, Singapore's previous National Day Parade (NDP) celebrations held on Aug. 9 were postponed to Aug. 21.