在 + 半空 + 中 / 悬在 + 半空
The noun 半空 (bànkōng) means 'mid-air' or 'halfway up in the air.' It refers to a position in the air that is neither on the ground nor at the highest point. It is typically used with 在 to form the location phrase 在半空中, describing something suspended or floating.
气球飘到了半空中,孩子急得直哭。
qìqiú piāo dào le bànkōng zhōng, háizi jí de zhí kū.
The balloon floated up into midair, and the child cried anxiously.
烟花在半空中绽放,美极了。
yānhuā zài bànkōng zhōng zhànfàng, měi jí le.
The fireworks bloomed in midair — absolutely beautiful.
那只鸟停在半空中,好像在寻找猎物。
nà zhī niǎo tíng zài bànkōng zhōng, hǎoxiàng zài xúnzhǎo lièwù.
That bird hovered in midair, as if searching for prey.