Can I get a passport for community drug rehabilitation?

You can apply for a passport during detoxification. You can apply for a tourist passport after detoxification. If you are an immigrant, it should be a bit difficult, because one of the application conditions for immigration is: no criminal record. The general process of visa going abroad is: determining the visa category → preparing the required application materials → submitting the visa application materials to the foreign consulate in China → waiting → collecting the visa at the consulate.