Tǔqì (-)
original: 吐气
blowing techniques (SE Asian mouth organs): in-/exhaling
Literal translation: 吐: "(to) spit"; 气: "air / breath"; Defined by Wong as "[to play with] different variations of breath".
Wong, Samuel Shengmiao: Qi’ - An instrumental guide to the Chinese orchestra. Singapore, 2005, p.143.
汉英词典 (Hàn Yīng cídiǎn) / A Chinese-English dictionary. 北京 [Běijīng], 1985, p.696 & 535-536 (气 ➁, ➂).