Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇨🇳 B-8260 - Gulfstream Aerospace G550 - Nanshan Jet B8260 - 4.8 mi away @ 39000 ft, heading ENE at 542 mph. Spotted for first time! [01:07:12 PM CDT] #7808D8 #B_8260 #GLF5 #NANSHAN #B8260 #autopilot #ADSB #ADSBbot