Which province does the license plate 'Hei S' belong to?

[DiHope]

Heilongjiang Province does not have license plates with the prefix 'Hei S'. Such plates might appear in films or TV shows but do not exist in reality. Here is some basic information about Chinese license plates: 1. Civilian vehicles in China use the '92-style' license plates, which have been nationally standardized since 1994. While the first two characters must comply with national regulations, the remaining characters can be freely chosen. 2. The first character is a Chinese character representing the provincial-level administrative region where the vehicle is registered. The second character is an English letter indicating the prefecture-level administrative region. The registration number on passenger vehicle plates allows authorities to identify the vehicle's origin and owner, facilitating traffic police in handling violations. 3. When assigning English letter codes to prefecture-level administrative regions, the letters 'L' and 'O' are typically avoided. 'O' is reserved for police vehicles or government agencies, as police license plates are considered special plates.