A lot of players really need to understand that a trading system won't be added for a lot of reasons. A lot of people would abuse the system by making multiple accounts. Pay attention to other games and you will notice the lack of such system in other games?

Oasis is just a publisher. Tencent (China server) is the one who made the game and is the one who decides how the game is updated. Also, if you want to be taken seriously, post it in the correction section as well by the way.