Using DeepSeek in China: Official Site + Mirrors

Updated: 2026-08-12. Availability, quotas, and model labels change. Third-party mirrors ≠ official DeepSeek—read their terms separately.

Overview

People searching “how to use DeepSeek in China” or “DeepSeek mirror” usually need four answers: which path opens reliably, how to finish a first chat, how to troubleshoot, and whether a third-party entry is safe enough. This guide follows select → operate → diagnose. It does not hard-code fragile networking tricks. Model names and billing follow DeepSeek and the live service UI.

What this guide solves

• Who should use official chat vs domestic convenience vs mirror studio vs API
• Steps from opening a page to a verifiable first conversation
• Four failure classes: network, login, congestion, model-name mismatch
• A minimum privacy and account-safety checklist

How to choose a route

Route A — Domestic convenience (fastest start)

Best when you want to start quickly for writing, study, office work, or light coding without fighting the network first.

• DeepSeek V4 domestic chat page

Pros: Low friction.
Caveats: Third-party / aggregate service—read privacy terms; never paste bank cards, ID numbers, or company secrets. A “V4” label on the page is not automatically an official model ID.

Route B — Mirror studio (side-by-side testing)

Best when you want multiple models in one workspace or longer studio-style sessions.

• AI Chat Studio

Pros: Easy A/B prompting.
Caveats: Routing and logging may differ from official chat; record the actual model identifier you selected.

Route C — Official chat + website (source of truth)

Best when you need official announcements, the official account system, and product claims you can cite.

• Product: www.deepseek.com
• Chat: chat.deepseek.com

Pros: Authoritative for version and policy statements.
Caveats: Reachability depends on your network; signup rules follow the live UI.

Route D — Official API (builders / teams)

Best for products, scripts, and automation with programmable control.

• Docs: api-docs.deepseek.com

Pros: Controllable, observable, scalable.
Caveats: You own key security and spend; use live model IDs from the docs—this guide does not freeze them.

Route	Best for	Time to first chat	Completeness	Privacy duty
A Domestic	New users, content/office	Fast	Depends on platform disclosure	Read third-party terms
B Mirror studio	Multi-model comparison	Fast	Aggregated UI; verify IDs	Read third-party terms
C Official	Long-term power users	Medium	High (official)	DeepSeek terms
D API	Developers / teams	Slow	High (programmable)	Keys and logs are yours

Recommended access steps

1. Pick the goal: casual chat/writing → A or C; product work → D; benchmarking → B.
2. Probe official pages: open www.deepseek.com and chat.deepseek.com; confirm they fully load.
3. If official chat is unstable: open the domestic V4 entry with a privacy-safe test prompt.
4. For multi-model checks: use AI Chat Studio and read the model blurb before asking.
5. Official signup path: long-lived email (or whatever the page offers); keep network stable during verification. Details: official entry guide.
6. Habits: store good prompts locally; never upload secrets; back up important outputs.

Copy-ready test prompt:

Organize the material into four parts: Conclusion, Evidence, Risks, Items to confirm.
Do not add facts missing from the material; mark unknowns as “needs verification.”
Material: [paste a de-identified excerpt]

Second prompt (speed + format):

Explain “what is RAG” in at most 8 bullet points.
One sentence per bullet; end with one sentence on when RAG is a poor fit.
Do not invent paper or product names.

Security and privacy checklist

• Confirm HTTPS; avoid lookalike domains and unknown “client” downloads
• Never upload passwords, API keys, ID documents, unpublished source, or customer lists
• On third-party entries, read retention and training-use language first
• Unique strong passwords; enable available 2FA on official accounts; do not reuse official passwords on mirrors if accounts differ
• At work: follow internal AI policy; default to minimum necessary + de-identification
• Keep local copies of critical outputs

Troubleshooting four common failures

1) Page will not load or is extremely slow

• Verify you are on deepseek.com / chat.deepseek.com or a mirror domain you trust
• Try another browser or a private window; disable request-rewriting extensions
• Compare official chat vs the domestic entry
• If DNS/routing is the issue, use A/B for daily work while still treating the official site as the announcement source

2) Signup / login failures

• Check codes, spam folders, phone/email format, and “too many attempts”
• Avoid rapid IP hopping and multi-tab spam of “send code”
• Cool down per the UI; skip disposable email farms
• Mirror accounts usually cannot log into the official site

3) Congestion or interrupted answers

• Peak-hour latency is normal; shorten context or start a new thread
• Split large attachments; send only what is necessary
• Prefer general mode when latency matters; reserve reasoning for hard steps
• If only one mirror is slow, compare with official chat to separate platform vs network issues

4) Model name / capability mismatch

• UI “V4” ≠ automatically a specific official generation—read identifiers and disclosures
• Cross-check formal names in API docs and official announcements
• Mirror issues go to that operator—not assumed to be DeepSeek outages
• Re-run critical conclusions on official chat with a fixed sample

Access

• Domestic: DeepSeek V4
• Mirror studio: AI Chat Studio
• Official chat: chat.deepseek.com
• Product site: www.deepseek.com
• API docs: api-docs.deepseek.com

Completion checklist

• Third-party vs official sites distinguished; passwords not mixed
• At least one path proven with a privacy-safe test prompt
• Privacy/data notes read for any third-party entry
• Official domains bookmarked (not from ads)
• “No sensitive uploads” rule written down
• Builders have opened API docs for the current model list

FAQ

Is the domestic entry the official site?

No. Domestic convenience pages and mirror studios are typically third-party or aggregated. Accounts, quotas, routing, and privacy differ. Official web and chat remain the authority for product claims.

Do I need a special network setup to use DeepSeek?

Not always. Many people start on a domestic convenience entry. Use the official account/API path when you need the full official stack. Judge by what actually loads for you today.

Are mirrors safe?

Nothing is absolutely safe. Prefer trusted operators, HTTPS, and clear privacy text. Never log into your primary email or pay on an untrusted page. Third-party ≠ official—do not paste secrets.

Does a mirror labeled V4 use the official V4 model?

You cannot tell from the name alone. Read disclosures and identifiers; for formal selection, trust official announcements and API docs.

Can I upload company documents?

Only if policy allows, after de-identification, and after you accept that entry’s data terms. Default: de-identify; avoid uploading originals when a paraphrase works.

Official resources

• DeepSeek website
• DeepSeek Chat
• DeepSeek API docs

Next reading

• Official entry and signup
• What is DeepSeek?
• V4 complete guide
• Prompt engineering guide

Summary

China access is not about one magical URL. Choose by reachability, trust, and privacy: daily work can use domestic or mirror entries; verification and development return to the official site and API docs. Check domains and terms first, test with de-identified samples, and keep humans in the loop for high-stakes outputs.