What's the difference between the license plate number, white card and yellow card in Hong Kong?

Bai Ka is in front of the car and Huang Ka is at the rear.

Hong Kong [Xi] People's Republic of China (PRC) Special Administrative Region

Hong Kong (Cantonese spelling: hoeng1gong2; ; English: Hong Kong; ; Mandarin pinyin: ?ng；; Short name: HK), short name "Hong Kong", full name is People's Republic of China (PRC) Special Administrative Region. It is located in the south of China, east of the Pearl River Estuary, along the South China Sea, bordering Shenzhen in the north, the Pearl River in the west, and facing Macao Special Administrative Region, Zhuhai City and Zhongshan City across the Pearl River Estuary.

Hong Kong is a highly prosperous international metropolis. The whole territory consists of Hong Kong Island, Kowloon Peninsula and New Territories, with a total land area of 1 104.32 square kilometers. By the end of 20 14, the total population was about 7.264 million, ranking third in the world in population density.

Hongkong has been the territory of China since ancient times. During the period of 1842- 1997, Hong Kong was once a British colony. After World War II, Hong Kong's economy and society developed rapidly. It is not only known as one of the "Four Little Dragons in Asia", but also one of the richest, most developed and highest living standards in the world. 1 July 19971day, People's Republic of China (PRC) officially resumed the exercise of sovereignty over Hong Kong, and the Hong Kong Special Administrative Region was established. The central government has complete power over Hong Kong, which maintains its original capitalist system and way of life and enjoys a high degree of autonomy in all matters except foreign affairs and national defense. "One country, two systems", "Hong Kong people ruling Hong Kong" and a high degree of autonomy are the basic national policies of the China government. [ 1][2][3][4]

Hong Kong is the third largest financial center in the world and an important international financial, trade and shipping center. It is also called "Newland Port" with new york and London. It is the freest economy and one of the most competitive cities in the world, enjoying a high reputation in the world and being rated as the first-tier city in the world by GaWC. [5][6][7][8][9][ 10]

Hong Kong is a place where Chinese and Western cultures blend together, combining the wisdom of China people with the advantages of western social system. It is famous for its clean government, good public order, free economic system and perfect legal system, and has the reputation of "Pearl of the Orient", "Gourmet Paradise" and "Shopping Paradise". [9][ 1 1]

Chinese name: Hong Kong?

Mbth: Hongkong.

Alias: Xiangjiang, Xiangdao

Administrative Region Category: Special Administrative Region

Region: China South China

Hong Kong Island, Kowloon Peninsula and New Territories.

Government Resident: No.2, Mei Tian Road, Mati, Central and Western District, Hong Kong Island

Telephone area code: +852

Postal code: 999077

Location: Southeast of the Pearl River Delta, east of the Pearl River Estuary.

Area: 1 104.43 square kilometers.

Population: 7.37 million (20 16)