中英双语告诉你“纹发”到底多么不简单　　纹发看似简单，其实蕴含的细节很多！Smp seems simple,in fact contains a lot of details!　　首先判断肤色，皮肤类型！该如何配比？如何更好的设计发际线？First judge the skin color,skin type!How to match?How to design hairline better?　　每个部位如何掌握下针的力度？针头长度如何调节？如何选择针头类型？如何调节电流电压？中途针头遇到突发状况如何处理？什么情况下立即更换针头？……How can each part master the strength of the needle?How to adjust the needle length?How do I choose a needle type?How to adjust current and voltage?Midway needle meets emergency how to deal with?Under what circumstances will th