Hello , can you help me out. I dont know what status NULL means. my order number is RC823795558CN

As of 14th March, the following is the status.
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RC823795558CN Collection Hangzhou RS Fri, 07 Mar 2014 10:59:00 GMT
RC823795558CN Dispatching Hangzhou RS Sat, 08 Mar 2014 13:05:00 GMT
RC823795558CN Departure from outward office of exchange Beijing RS Thu, 13 Mar 2014 12:02:00 GMT
RC823795558CN Opening Beijing RS Thu, 13 Mar 2014 14:06:00 GMT
RC823795558CN Delivery to airport Beijing RS Fri, 14 Mar 2014 06:02:00 GMT
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The English information on the official website of China Post is translated from tracking status in Chinese language, because of this not all information can be successfully translated.
So “NULL” indicates this technical problem of the website, not your parcel.
Also if the package has left China it can be shown as ' NULL' , since the tracking information can no longer be updated while the package is in transit.