This paper summarized WANG Linpeng's experience in treating

bi

（痹） syndrome by stages with pathogen-purging and collaterals-unblocking acupuncture. Cold， heat and stasis are the main pathogenic factors of

bi

syndrome， and the method of purging pathogen and unblocking collaterals should be used. At the early stage，

bi

syndrome is mainly caused by cold pathogen， and the main pathogenesis is

yang

deficiency and cold invasion， for which fire needling is strongly recommended to warm

yang

and purge cold mainly with shallow and scattered pricking at local parts and point bloodletting along the channels according to channel pattern differentiation. At the middle stage， pathogenic heat and stasis is mainly involved， and the pathogenesis is pathogenic cold generating pathogenic heat and stasis. The recommended treatment method is bloodletting-fire needling to dispel heat and purge stasis. Bloodletting usually takes the

he

-sea points （合穴） according to channel pattern differentiation， while harsh and deep fire needling at points is used. At the late stage when channels and collaterals are deficient and impeded， it is suggested to supplement zang-fu organs （脏腑） depletion first， and then dispel pathogen and unblock collaterals， usually with WANG Leting's “Old Ten Needling” to regulate and supplement spleen and stomach， and unblock collaterals and move

qi

using five-shu points （五输穴）.