The CNY/VND exchange rate is one of the few cost inputs that changes daily and hits every order you place on 1688, regardless of whether your supplier raised their prices or not.
Most sellers check the rate on Google and move on. That number is not what you actually pay. Below is where the rate actually hits your landed cost, how much a 1% CNY move takes from your margin, and three things you can do right now to stop the quiet erosion.
Where the CNY/VND Rate Hits Your Cost of Goods in the 1688 Import Chain
1688 lists everything in CNY. You pay in VND through a sourcing agent or forwarding service, which means every order goes through a conversion at a specific moment in time. That moment is not when you set your selling price on Shopee or TikTok Shop.
The rate locks at the time of actual payment, not when you browsed the listing. Between your pricing decision and the day your agent pays the supplier, three to seven days can pass. That gap is where the risk sits.
There are two rate layers on every order. First is the interbank rate, the one published by the State Bank and shown on Google. Second is the spread your sourcing agent adds on top, typically 1-3% above interbank, not listed as a separate fee line. It comes pre-baked into the rate they quote you.
Your actual cost of goods equals the CNY price on 1688 multiplied by your agent's rate, not the Vietcombank rate from that day. These two numbers regularly differ by tens of thousands of VND per million.
CNY Up 1%: How Much Does It Actually Eat Your Margin?
Concrete example. You place an order worth 10,000 CNY. At 3,450 VND per CNY, that is 34.5 million VND. If CNY moves to 3,520 VND per CNY, the same order costs 35.2 million VND. That is 700,000 VND gone before shipping, platform fees, or returns.
Scale it: a shop importing 50 million VND per month loses roughly 1 million VND in cost of goods if CNY strengthens by 2%. Nothing sold, no volume change. Just the rate.
On thin margins, this compounds. Running 15-20% gross margin, a 2% increase in your cost base from currency movement wipes out 10-13% of your actual profit. The exchange rate moves on the full cost of goods, while margin is only the thin slice above that base.
Before going further, it helps to have a clean view of how cost of goods is calculated for 1688 imports so you are working with accurate inputs.
Hidden Exchange-Rate Risks Most Sellers Miss
The 3-7 day window between placing an order and actual payment is where most surprise cost comes from. A central bank announcement in that gap can move the rate fast.
Agents who do not itemize their spread make it nearly impossible to track. You see a total VND invoice, not CNY multiplied by rate. Without that line item, you cannot tell whether cost increased from the supplier or from the rate.
Most sellers also do not log the rate used on each order. After three months, there is no data to audit. You cannot back-calculate what happened to cost of goods, and you cannot identify drift.
The slow-burn version is the most dangerous. CNY strengthens by 0.5% one month, 0.7% the next. Revenue is steady so the P&L looks fine, but margin is thinning. Understanding all the cost layers on an order, including fees beyond the product price, is covered in the 1688 import fee breakdown for new sellers.
3 Ways to Protect Margin When CNY Moves
Buffer your pricing rate by 3-5%. Instead of using today's CNY/VND rate as your cost input when pricing products, add 3-5% to the CNY amount before converting. This absorbs small movements without forcing constant repricing. For SKUs running below 15% margin, push that buffer to 5-8%.
Lock a price in USD or VND with established suppliers for recurring orders. Difficult with one-off orders. Realistic once you have a stable factory relationship with consistent monthly volume. Some 1688 suppliers will agree to a fixed price for 3-6 months if volume is committed. The approach for negotiating price locks with 1688 suppliers has more on how to frame that conversation.
Time large orders around rate cycles. CNY/VND does not move in a straight line. Track the rate over a 3-month window on Trading Economics and note the low points. Shifting an order by one week can save 0.5-1% on cost if you have flexibility.
When to Review Your Selling Price Because of Rate Changes
The practical trigger: CNY has moved more than 2% from the rate you used the last time you set your selling prices.
Do not reprice everything at once. Moving prices on Shopee or TikTok Shop affects click-through rates and search ranking. Adjust the lowest-margin SKUs first, wait two to three weeks, then move to the next tier.
Log the rate with each purchase order. One column in your restock tracker is enough. That log becomes your baseline for every pricing decision. Tying rate review to your restocking cycle makes it automatic. Inventory turnover timing for 1688 imports covers how to structure that cycle if you need a starting point.
Free Tools for Tracking CNY/VND
Vietcombank (vcb.com.vn). Updated twice daily. The closest publicly available reference to actual transaction rates for VND. Use it as your anchor, not Google's mid-market rate.
Trading Economics (tradingeconomics.com/china/currency). Weekly, monthly, and yearly charts. Useful for spotting trend direction and identifying the range your orders have been priced within over the past quarter.
A simple Google Sheet. Columns: order date, CNY amount, agent rate applied, total VND paid. After six months you can calculate your real average rate, measure your agent's spread, and detect if it has been widening.
Bank rate alert apps. Vietcombank and Techcombank both have mobile apps with rate alert features. Set a ceiling rate that represents the point where your margin goes below acceptable, and turn on the alert.
FAQ: Common Questions About CNY Rates and 1688 Importing
Does a stronger CNY automatically make 1688 goods more expensive?
Yes. The supplier does not need to raise their CNY price for your VND cost to go up. A stronger CNY means you pay more VND for the same amount of yuan. The cost increase is automatic and invisible unless you are tracking it.
How much above the interbank rate do sourcing agents typically charge?
Most agents add 1-3% on top of the interbank rate. To check your agent's actual spread, compare the rate on your invoice to Vietcombank's buying rate on the same date. The difference is the real cost of using their service.
Can a small shop lock the CNY rate with a 1688 supplier?
For one-off orders, almost never. For shops placing regular orders with the same factory each month, it becomes a real conversation. Some factories will agree to USD pricing for a 3-6 month window if volume is committed. Start that conversation only after two or three completed orders with a clear reorder pattern.
Are there times of year when CNY tends to be relatively weaker against VND?
There are patterns worth knowing. Short-term CNY softness sometimes appears around Chinese New Year as domestic liquidity tightens. Periods after weak Chinese GDP data and times when the Federal Reserve raises rates can also shift the balance. These are tendencies rather than rules, but useful if you have flexibility on order timing.
What pricing buffer is enough to handle rate volatility?
For shops above 20% gross margin, a 3-5% buffer on the CNY rate is workable. Below 15% margin, use 5-8%. Do not apply one number to every SKU. High-volume SKUs where price changes affect ranking need tighter buffers with more frequent review. Lower-volume SKUs can carry a wider buffer and be reviewed quarterly.
If you want to map real landed cost before committing to an order, Ordinex Scout is in private beta for that exact workflow. The Orders module for PO tracking is close behind. Both are at ordinex.cc.