I can't find the mailing number of Shanghai residence permit.

If you apply for a residence permit in Shanghai through relevant channels, but you can't find the single number, the following may happen:

1. The courier company hasn't uploaded the courier information to the courier website yet. You can wait for a while and check again.

The temporary residence permit is still being processed, and it will take some time to find it.

3. It may be a courier in the same city, not a courier. You can contact the relevant personnel to inquire.

If you encounter special circumstances, such as holiday delay, you may not find it.

If you do not meet the above conditions, you can contact the local police station or residence permit handling agency to understand the specific situation.