place an order and get 10 refill (0.5mm) for free(下单送10 支笔芯 （0.5mm）)

randomly send 1 small box (1-3 elastic series mixed hair)(随机发1小盒（1-3弹系列混着发）) buy 1 get 1 get 2 small boxes (1-3 bomb series mixed hair)(买1送1发2小盒 （1-3弹系列混着发）) buy 1 get 2 get 3 small boxes (1-3 bomb series mixed hair)(买1送2发3小盒（1-3弹系列混着发）) buy 1 get 3 get 4 small boxes (1-3 pop series mixed hair)(买1送3发4小盒（1-3弹系列混着发）) buy 1 get 4 get 5 small boxes (1-3 pop series mixed hair)(买1送4发5小盒 （1-3弹系列混着发）) buy 1 get 5 free 6 small boxes (1-3 series mixed hair)(买1送5发6小盒（1-3弹系列混着发）) buy 1 get 6 free 7 small boxes (1-3 bomb series mixed hair)(买1送6发7小盒（1-3弹系列混着发）) buy 1 get 7 free 8 small boxes (1-3 series mixed hair)(买1送7发8小盒（1-3弹系列混着发）) buy 1 get 8 free 9 small boxes (1-3 series mixed hair)(买1送8发9小盒（1-3弹系列混着发）) buy 1 get 9 get 10 small boxes (1-3 bomb series mixed hair)(买1送9发10小盒（1-3弹系列混着发）)