HONG KONG - Hong Kong residents celebrated the passage of the national security law for the special administrative region on Tuesday, on the eve of the 23rd anniversary of the city's returning to the motherland.

Residents celebrate the passage of the national security law for Hong Kong, at Tamar Park, Hong Kong, June 30, 2020, on the eve of the 23rd anniversary of the city's returning to the motherland. (CALVIN NG/CHINA DAILY)

A Hong Kong resident waves a Chinese national flag to mark the 23rd anniversary of the establishment of the Hong Kong Special Administrative Region, at Tamar Park, Hong Kong June 30, 2020. (CALVIN NG/CHINA DAILY)

Hong Kong residents wave the national flags to celebrate the 23rd anniversary of the establishment of the Hong Kong Special Administrative Region, at Tamar Park, Hong Kong June 30, 2020. (CALVIN NG / CHINA DAILY)

Chinese national flags and Hong Kong Special Administrative Region flags hang along a street in Tsim Sha Tsui, Hong Kong, on June 30, 2020, one day before the 23rd anniversary of Hong Kong's returning to the motherland. (RAYMOND CHAN / CHINA DAILY)

The Chinese national flag and a flag of HKSAR are reflected in a window of a building at a shopping district in Tsim Sha Tsui, Hong Kong, on June 30, 2020. (RAYMOND CHAN / CHINA DAILY)

A national flag and a HKSAR regional flag hang outside a building in Tsim Sha Tsui, Hong Kong, on June 30, 2020. (RAYMOND CHAN / CHINA DAILY)