Track and get real-time status updates for SJKJ shipments.
SJKJ, also written SZKJ, is the tracking label used by 速臻科技 (Suzhen Technology), a cross-border e-commerce logistics operator whose site runs at szkj18.com and whose business filing is registered in Guangdong province, southern China. The abbreviation on its own tells you very little, which is why so many people search for it: the letters come from 科技, the Chinese word for technology, and the same operator is referred to interchangeably as SJKJ and SZKJ.
The company sells the middle of a cross-border journey rather than the doorstep. Its own site lists first-leg FBA freight into overseas warehouses in Japan, Europe and the United States; overseas warehousing with a free storage period; one-piece dropshipping wired to marketplaces including Temu, SHEIN and Amazon; and returns handling with re-labelling. Goods move by sea or by air, and the customers are online sellers rather than shoppers.
For tracking, that turns out to be unusually good news. Many operators of this kind issue internal references that never collect a scan, but SJKJ numbers follow one strict format and most of them do carry a real journey: the large majority of SJKJ references entered on the 24hTrack platform return scan events rather than an empty result. If you have an SJKJ number, it is worth entering as it is — you should normally see movement.
Ships for: Amazon FBA sellers shipping stock out of China, Temu, SHEIN and other marketplace merchants, Online stores dropshipping from overseas warehouses
Tracking number format: KJ, then 10 digits, then the letters CN — 14 characters in total. Every SJKJ reference seen on the 24hTrack platform follows this one form, so a number that does not match it is probably from a different carrier
Knowing where your parcel is makes it easier to plan the day you collect it. With 24hTrack you don't need an account on SJKJ's website. Paste the tracking number in the box above and we work out which carrier it belongs to and show you every scan SJKJ has published, on one page.
Official carrier website: www.szkj18.com
SJKJ is the tracking label of 速臻科技 (Suzhen Technology), a cross-border logistics operator registered in Guangdong province, China, which runs its merchant site at szkj18.com. It handles first-leg freight into overseas warehouses in Japan, Europe and the United States, overseas warehousing, dropshipping and returns with re-labelling for online sellers. It works for merchants rather than selling directly to shoppers, which is why the name appears on a parcel without ever having been chosen by the person receiving it.
It is 14 characters: the letters KJ, then 10 digits, then the letters CN. That form is completely consistent — every SJKJ reference seen on the 24hTrack platform matches it. The KJ at the front comes from 科技 in the operator's Chinese name, and the CN at the end marks China as the country of origin. If the number a store gave you does not fit this pattern, it is almost certainly issued by a different carrier, and searching it under SJKJ will not find anything.
Yes. Both spellings refer to the same operator, 速臻科技, and people arrive looking for each of them. The variation comes from transliterating the Chinese name, so you do not need to work out which one is correct — a KJ number will resolve the same way whichever spelling brought you here.
Most SJKJ numbers do report scans, so a stall usually means the shipment is between milestones rather than that the number is wrong. The long quiet gaps sit where you would expect on a China-origin lane: after export scanning while the consignment is on the water or in the air, and again while it clears customs in the destination country, where nothing is published for days at a time. It is also normal for the last leg to be completed by a local delivery company in the destination country, so the final scans may appear under that carrier instead. If the number has never shown anything at all, check it against the KJ + 10 digits + CN pattern first.
There is no public list, because 速臻科技 sells to merchants rather than to consumers. Its own site says it builds services for sellers on marketplaces including Temu, SHEIN and Amazon, and for stores dispatching from overseas warehouses. In practice an SJKJ number appears because the shop you ordered from chose this operator for the China leg of the journey, so the shop — not the operator — is the right place to ask about an order.