Bkex invitation code is (DJP6HUR3). You have to put this invitation code while you create account on BKEX crypto exchange to get upt0 100% discount on the trade fee. BKEX is one the best crypto exchange with no negative reviews. BKEX is running referral program in which if you register to BKEX using invitation code than you will get discount on fee. BKEX exchange is mainly used in United states, turkey , korea, Thailand.