The main office is located at:
Jinshan Building
No.55, Sec. 2, Jinshan S.
Da-an District, Taipei City 10603, Taiwan (R.O.C.)
TEL : +886-2-2321-4311 or +886-2-2392-1310
There is a Customer Service hotline : 0800-700-365 or (04)23542030 if dialing on a mobile phone.
Mailing a letter under 20g domestically costs NT$ 5. Prompt service costs NT$12. A complete list of prices can be found on their site. There is also a handy guide to help you know the rate of postage.
International Parcel Postage Rates can be found here.
Vertical: Addressees' names are written in the centre and addresses in the right of the envelop/package. Zip codes are written on the upper right-hand corner. Senders' names and addresses are written on the lower left-hand of the envelop/package. Zip codes are written on the left-hand corner of the address. Example.
Horizontal: Addressees' names and addresses are written in the centre right of the envelop/package. Zip codes are written on the first line of the address. Senders' names and addresses are written on the upper left-hand corner or on the reverse side of the envelop/package. Zip codes are written on the first line of the address. Example.
There are many locations throughout Taiwan. There are also many offices within Taipei.