Professor WANG Yuguang believes that systemic sclerosis-associated interstitial lung disease （SSc-ILD） falls under the traditional Chinese medicine （TCM） categories of "lung impediment" and "lung atrophy". The disease location involves the lungs， spleen， liver， kidneys， and triple energizer， encompassing the five

zang

organs. The etiology is attributed to congenital insufficiency and deficiency of

qi

and blood， with invasion of external pathogens dominated by wind， cold， and dampness. The pathogenesis is characterized by deficiency of

yin

and

yang

of the liver and kidney； invasion of wind， cold， and dampness pathogens into the skin and muscles； impairment

of the nutritive

qi

； stagnation of cold phlegm； involvement of the spleen and stomach's transportation and transformation functions；

qi

stagnation and blockage of collaterals； and progression from impediment syndrome to atrophy syndrome. The clinical treatment principle is to fill the

yin

and

yang

of the liver and kidney， warm and dredge the collaterals， benefit

qi

， and expel pathogens. Treatment focuses on the three

yin

meridians， simultaneously addressing both exterior and interior， effectively alleviating clinical symptoms and improving patients' quality of life.