usps 单号 谁能帮我查一下

不要着急撒，我一个美国客户18号从美国通过USPS发一个样品。今天29号了还没到，据说要差不多一个月才能到，你也知道USPS里单号LJ开头的是走海运的。。。

Label/Receipt Number: LJ52 0537 525U S
Service(s): International Letter
Status: Electronic Shipping Info Received

The U.S. Postal Service was electronically notified by the shipper on July 31, 2009 to expect your package for mailing. This does not indicate receipt by the USPS or the actual mailing date. Delivery status information will be provided if / when available. No further information is available for this item.

意思就是电子发货信息已经收到 但是到现在为止还没有跟踪信息