Radical 宀

7 strokes

house 宀 (91a) + yuan 元 (301) = finish 完

完成 (259) wánchéng fulfil, accomplish

[用完 (130) yòngwán use up]

The high-class building firm has a custom, when building a new house, to cement a yuan coin to the roof when the work is finished (to show that they don’t penny-pinch). / [DIY pronunciation]