The International Space Station ("ISS" for short) passed over the city of Guilin, Guangxi, at 9:27 a.m. The city's radio amateur (call sign: BG7SRC) successfully copied the APRS beacon (frequency 145.825Mhz) transmitted by the ISS.

The Automatic Packet Report System (APRS) is a project in the amateur radio, which combines the amateur radio and the Global Positioning Satellite System (GPS) to achieve the purpose of real-time position transmission in the AFSK AX.25 communication mode. APRS receiving stations around the world can connect to the Internet to upload the APRS packet information received by the station to the APRS server, and finally compile the data for users to read.

There is an APRS Digipeater in the amateur radio module of the International Space Station, which uses a frequency of 145.825Mhz (the VHF band amateur satellite frequency is 145.800-146.00Mhz). It can be used for APRS operations, not only to send location, but also to transmit text messages.

Frequency information can be attached to APRS messages, making it easy for other hams to find out what frequencies you are using. Some hams plug their personal weather information (not weather forecasts) into the APRS system to provide real-time information on precipitation, wind, etc. There is also the short message protocol using APRS, in the case of being disconnected from the Internet, in emergency communication, the advantages of information release and location sharing APRS are much greater than voice communication. APRS can not only interact with stations on the ground, but also conduct satellite communication.