Chinese · Pronunciation Guide
bahn-GOONG-shrr: a hard fall, a high plateau, then another hard fall. Down, up, down.
bàngōngshì
Fall, plateau, fall — a symmetrical shape with no sandhi anywhere. Both stops are unaspirated, which is worth flagging because English speakers add breath to initial consonants automatically, and here neither the b nor the g should have any. The nasal contrast between the first two syllables is a further self-check.
Listen: 办公室
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我每天在办公室工作。
Wǒ měi tiān zài bàngōngshì gōngzuò.
I work at the office every day.
Listen: 我每天在办公室工作。
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我每天在办公室工作。 opens with wǒ and měi adjacent, both dipping, so wǒ rises. Then tiān holds level, zài plunges, and the three syllables of the office word follow, before gōngzuò adds a level and a fall. Four separate descents in the sentence, each needing its own reset to the top.
Aspirating either stop changes the syllable — pàn and kōng respectively. Keep both releases silent. The third syllable draws the usual "she", with a vowel that does not exist. And the nasals get merged so that bàn and gōng rhyme, when the first should close at the teeth ridge and the second at the back of the mouth.