Compose, revise, and validate Chinese couplets (对联/楹联/春联/挽联/行业联/题赠联), including core rules (字数对等、词性/结构/节律对仗、平仄对立、形对意联), optional 用典与押韵, and presentation (横批与贴法). Use when asked to 写对联/拟横批/改对联/检查平仄或对仗/为节日婚寿乔迁开业题赠等场景拟联, or when you must use web search to research classical literature (诗词/典故出处) and modern hotspots to craft context-appropriate couplets.