On all three ordering paths — balance, WeChat and Alipay — the price is recalculated on our side after you submit: your own agreed rate first, the catalogue base price if you have none, and whatever amount the page sends is ignored outright. The price shown is the price charged, so a tab left open on stale prices can no longer produce a mismatch. If an item cannot be priced at that moment — the catalogue has just changed, say — that line is rejected with a prompt to refresh and retry rather than going through at the wrong figure. Quantities take whole numbers from 1 to 999 and a single order runs between ¥1 and ¥10,000. Recharge screenshots are now visible only to the account that owns the order, and signing out genuinely clears the session on our side.