This article summarizes Professor HAN Mingxiang's clinical experience in treating lung cancer based on the theory of "deficiency-phlegm-stasis-toxin". It is believed that depletion of healthy

qi

， together with binding of phlegm and stasis forming into toxin is the core pathogenesis of lung cancer occurrence and development. In clinical practice， the core treatment principle should be reinforcing healthy

qi

， resolving phlegm， removing stasis， and relieving toxins. The treatment should be given based on syndrome differentiation. For the syndrome of lung-spleen

qi

deficiency， the self-formulated

Jianpi Huatan Zhike Decoction

（健脾化痰止咳汤） can be applied to fortify the spleen and replenish

qi

， thereby reinforcing healthy

qi

. For the syndrome of deficiency of both

qi

and

yin

， the self-formulated

Shenmai Yuzhu Decoction

（参麦玉竹汤） is used to nourish

yin

and moisten the lungs， thereby clearing the source. For the syndrome of phlegm-dampness accumulating in the lungs， the self-formulated

Sizi Wenfei Decoction

（四子温肺汤） is applied to warm the lungs and resolve phlegm， thereby diffusing the lung

qi

. For the syndrome of

qi

stagnation and blood stasis， the self-formulated

Yiqi Zhuyu Decoction

（益气逐瘀汤） is used to activate blood and resolve stasis， thereby unblocking the collaterals. For the syndrome of binding of phlegm and stasis， the self-formulated

Jiejie Decoction

（结节方） is utilized to resolve phlegm and remove stasis， thereby dissipating nodules. For the syndrome of lung deficiency with toxin accumulation， the self-formulated

Qiyu Sanlong Decoction

（芪玉三龙汤） is applied to reinforce healthy

qi

and remove toxins， thereby combating cancer. Medications are flexibly prescribed based on syndrome differentiation， with an emphasis on reinforcing healthy

qi

and eliminating pathogenic factors， and maintaining the balance of

zang

-

fu

（脏腑） organ functions as well as

qi

， blood，

yin

and

yang

.