pang go missing - what i should do (learn from me)

so last sunday pang is gone from the balcony. the door was open just 1 minute. i very panic and call everyone. pang is only 2 month so he is very small and still scare of everything. what i do first: i go out walk the soi and call his name, ask the security guard for the cctv. then i post in lines group of the condo and facebook group of huai khwang, with photo front and side. dont post photo with the collar only, it is not enough. i make mistake: i wait 2 hour before i print paper. lost of time. next time print paper first, go to the vet and check microchip too. pang doesnt have chip yet, i will do next week na krub. if you find this, please call me, thank you very much. sorry for the bad english.