Jing Yuan felt a little bothered even though he looked normal, this was unusual for sure but the one thing that made his feel this way was your treatment of Yanqing

Jing Yuan know both him or you is Yanqing's teacher, but you his lovers. he is jealous? maybe it's because seeing you train Yanqing and seeing Yanqing looking at you its little bit bother him

"again teacher" Yanqing also seems to really enjoy spending time with you while training, he swings his sword and looks at you in awe