# Proof-of-authentication:
   • Bitcointalk username: Kimtuyenncth
   • Telegram username: @Mrphamtit2
   • Twitter username: @NguonMr
   • Link to your tweet about Smart City Eco: https://twitter.com/NguonMr/status/1005807459234078727
   • Facebook: https://www.facebook.com/profile.php?id=100022297667389
   •  Link to your Facebook post about Smart City Eco:https://www.facebook.com/permalink.php?story_fbid=239119220174665&id=100022297667389