The conclusion is that if your parents are running a restaurant, the work unit and position can be determined according to the actual situation. First of all, the work unit should indicate the nature of self-employment, such as "individual industrial and commercial households" or "the name of their own hotel", and the position column can be filled in as "operator" or "shopkeeper". If they don't have a formal position name, they will be marked as "none". Because they are engaged in the catering service industry, their positions can be further described as "catering operators" or "catering management".

For the occupation, you can write "catering service" or "catering employees", which is in line with the service and entertainment direction in the occupation classification. If you need a detailed description, you can add specific positions such as "chef" or "waiter". Remember, a position is different from a position. A position is more inclined to the actual work content, and a position may have the meaning of management and professional title.

for example, if one of them is in charge of financial management, it can be filled in as "financial manager of catering industry". When filling in, you should keep it concise and clear, and avoid complicated job title descriptions to avoid misunderstanding.

In short, for the units and positions of individual operators, it is enough to truthfully reflect their business and actual roles, without too much complication.