The United States, Europe, Japan and Southeast Asian countries, for example, are all strict about requiring various documents for mainland Chinese, including proof of financial resources, reasons for going abroad, guarantors, etc. And the length of stay is often set very short.
像美國、歐洲、日本、東南亞國家，就對中共護照的簽證發放極嚴，要財力證明、出國理由、保證人等等，即使核發，天數也極短。