This paper summarized ZHANG Zhiyuan's experience in differentiating and treating constraint syndrome. The occurrence of constraint syndrome is believed to be related to the internal damage caused by the seven emotions and binding constraint of visceral

qi

， and there are four types of constraint syndromes， namely binding constraint of liver

qi

，

qi

constraint transforming into fire， binding constraint of phlegm

qi

， and heart-kidney yin deficiency. Correspondingly， the treatment strategy is to soothe the liver， rectify

qi

and resolve constraint mostly with

Sini Powder

（四逆散） plus wine-fried Dahuang （

Radix et Rhizoma Rhei

）， to calm the mind with heavy sedatives and relieve the internal wind commonly with self-made

Feilong Decoction

（飞龙汤）； to dissolve phlegm， dissipate masses and dispel phlegm-dampness mostly with modified

Wendan Decoction

（温胆汤） plus self-made

Xiao Kaixin Decoction

（小开心汤）； and to clear heat， enrich yin and calm true yin by using modified

Huanglian Ejiao Deoction

（黄连阿胶汤）.