Wow, 22 rules to reply a thread here.
Anyway, I saw a question asking what site we use to track our packet.
I'm gonna answer that though someone had posted 1tracking.
Maybe it's the network, 1tracking's very slow to track a package comparing to many other sites.
I shall say 17's the quickest but when it can't identify a tracking numer, choose a correct one is annoying to me.
So usually I use another site named Tracktry