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Answer
Some cities promote digital departure-tax-refund flows for overseas visitors at participating merchants. Eligibility, minimum spend, and “instant refund” vs airport processing depend on the store and current rules.
Shanghai materials have described online multilingual tax-refund processing for participating shopping. Treat promotional coverage as a lead — verify inside the official platform or store before you rely on it.
Keep itemized receipts, passport, and unused goods as required. ChinaMate does not process refunds.