自动画缠论笔，经反复测试，画线非常精准，不知道有木有大神能把他改成EA(Auto-wrapping argumentation pen, after repeated testing, drawing line is very accurate, do not know that there is a wood God can change him into EA)

缠论自动画笔，打开通达信软件，公式编辑器，然后复制粘贴公式，就可以了(so easy! Belive me,it is good for you to study bi.)