- 天衣无缝 tiānyīwúfèng flawlessperfect and natural; without any traces of human effort, gaps, or flaws
- 苍蝇不叮无缝蛋 cāngyingbùdīngwúfèngdàn no smoke without firethere is no smoke without a fire; rumors or accusations usually have some basis in fact or arise from an individual's own flaws or mistakes
- 无缝连接 wúfèngliánjiē seamless connection