When trying to use the web app to open in browser I get this error message
This site can’t be reached
app3.hongkongpost.hk’s server DNS address could not be found.
DNS_PROBE_FINISHED_NXDOMAIN
The address it's trying is this:
http://app3.hongkongpost.hk/CGI/mt/genresult.jsp?tracknbr=<ITEM NUMBER>
I removed the item number. Official website currently does not know this item yet but this should be a different matter.