Start with the bottom line: if you have 2 to 10 boxes, mostly clothing, books, and daily necessities, air freight is the best option for shipping back to China. If you have bulky furniture like sofas, beds, or a piano, or if your total volume exceeds 2 to 3 cubic meters, choose sea freight. And if you have only one box, neither option is worth it. Buy extra baggage allowance from the airline and carry it with you.
Returning students usually have 2 to 5 boxes and ship by air. But Chinese nationals who have lived abroad for more than 3 years and are moving back with their entire household often have several cubic meters of goods. For them, sea freight is the only realistic choice. Below, I walk through both options one by one: the right scenarios, the costs, and the transit times.

1. First, calculate how much you have

Before choosing a shipping method, estimate your belongings. A standard 40×50×60 cm carton is about 0.12 cubic meters. Even with 10 boxes, your total volume is only about 1.2 cubic meters, which doesn't reach the 2 to 3 cubic meter minimum for sea freight.

So the dividing line is clear. Pure baggage (clothing, books, kitchenware) usually fits in 10 boxes or fewer; send it by air. The moment your list includes a loveseat (about 1 to 1.5 cubic meters), a disassembled 1.8-meter bed (about 1 to 1.5 cubic meters), or an upright piano (about 1 to 2 cubic meters), the nature of your shipment changes, and sea freight is the way to go.

2. Air freight: the cost-effective choice for small shipments

Air freight back to China is priced per box, 2 boxes minimum. Each box has a weight limit of 25 kg (22 kg on some US routes, 13 kg on Japan's small-box route). You pack the boxes yourself, and a 40×50×60 cm carton is recommended. You can ship a 28-inch suitcase directly, but it incurs a non-standard packaging fee of about 200 yuan per box, and damage isn't covered.

Costs (for reference only, subject to real-time confirmation):

• Minimum of 2 boxes for shipments back to China; the more boxes, the lower the per-box rate.
• US: about 1,300-1,500 yuan per box;
• UK: about 1,400-1,500 yuan per box;
• Germany: about 1,000-1,100 yuan per box;
• Japan line is the best value: about 800 yuan per box from Tokyo, with a 10% discount for 10 boxes;
• Canada: about 1,600-1,700 yuan per box.

The carrier charges the greater of actual weight and volumetric weight (length × width × height ÷ 5,000), so pack your boxes tightly and don't ship air.

Speed is air freight's biggest advantage: about 10 to 25 days door to door, including 5 to 7 days of flight time and 7 to 15 business days for customs clearance in China.

Note that air freight does not include door-to-door insurance. In the rare event of a lost shipment, compensation is double the freight. Keep valuables and fragile items with you instead of packing them in air freight boxes.

3. Sea freight: the only solution for bulky furniture

Sea freight is charged by volume, usually with a 2 to 3 cubic meter minimum, and includes door-to-door service: packing and pickup at your home, export customs declaration, ocean shipping, customs clearance in China, delivery to your door, unpacking and basic assembly, and removal of packaging waste.

Costs (for reference only, subject to real-time confirmation):

• Sea freight back to China starts at 3 cubic meters: about 15,000 yuan and up from the US;
• From Europe: 10,000 yuan and up;
• From Japan: 15,000 yuan and up;
• From Australia: about 20,000 yuan;
• Upright and grand pianos: about 20,000 to 35,000 yuan, with custom wooden crating for reinforcement.

Do the math and it's clear why regular baggage should not go by sea. For the same move back to China, 10 boxes by air cost about 8,500 to 15,000 yuan. Sea freight starts at 10,000 to 20,000 yuan just for the minimum, and you still have to find enough volume to qualify. Conversely, a loveseat by air is simply unrealistic. Sea freight is the only option.

On timing, prepare to wait: about 1 to 3 months door to door, roughly 1 to 3 months on US routes, about one month on Japan routes, and 2 to 3 months on European routes. Anything you need urgently, carry it with you or send it by air.

4. Customs rules that apply to both options

1. Duty-free allowance. Personal used items within 5,000 yuan are duty-free. Carry-on and unaccompanied baggage share this allowance. Amounts above that can be declared at depreciated value, with a tax rate of about 13% to 20%. Customs does not accept zero-value declarations, nor does it accept brand-new items declared as personal effects.

2. You must be back in China. Customs clearance must be completed within six months of your entry. When you arrive, get the Declaration Form for Luggage and Articles of Inbound/Outbound Passengers at the airport customs counter and have it stamped. This form is the key to the duty-free allowance. Send it via SF Express next-day delivery; customs does not accept same-city flash couriers or postal express.

3. Original passport. Starting May 22, 2026, Beijing customs will require the original passport for personal effects clearance. Photocopies and scans will no longer be accepted. Plan the mailing schedule for your passport in advance so it doesn't conflict with your travel plans.

4. Open-box inspection. Customs conducts 100% open-box inspections on inbound baggage. More than 50 books cannot clear customs. Cosmetics and items with lithium batteries are prohibited in shipments, so carry them with you.

A final note

The decision path in brief:

1. One box: buy extra baggage allowance and carry it on board.
2. Two to ten boxes of pure baggage: ship by air, delivered to your door in 10 to 25 days.
3. Bulky furniture or more than 2 to 3 cubic meters: ship by sea, and allow more money and time.

Both options follow the same customs rules for returning to China. The baggage declaration form and the original passport: don't leave either behind.