In general, if it is a temporary problem, such as passport expiration, visa problems, etc. , after the solution, you can apply for entry again, and the time interval is not mandatory. In this case, you can contact the Hong Kong Immigration Department to find out the specific reasons for refusing entry and follow their advice. However, if you are refused entry due to violation of laws and regulations or other security reasons, you need to wait for a while before you can re-apply for entry. In this case, you need to wait until the punishment expires or the problem is solved before you can apply for entry.
According to the regulations of the Immigration Department of the Hong Kong SAR, if the reason for being refused entry is a violation of Hong Kong laws and regulations or involves security issues, the Immigration Department will strictly examine the person's entry application within 1-2 years after being refused entry, which may require more materials and certificates, and cannot guarantee the success of the final application.
Therefore, it is suggested that if you are refused entry, you need to know the specific reasons for being refused and solve the problem as soon as possible. If it is a temporary problem, you can re-apply for entry after solving it; If you encounter complicated problems, it is recommended to seek professional legal advice or help from relevant departments.