Yǎnyuán huànshàng tóutào, biànchéng le lìng yī gè juésè.
The actor put on a wig and transformed into another character.
Tips
usage
头套 can refer to various head coverings: a full hood/mask (like a balaclava), a theatrical wig or headpiece, or even a pillowcase (枕头套). Context determines the specific meaning.
