周子 / Zhouzi (Qi minister)
周子 / Zhouzi enters the wiki through 《资治通鉴·周纪》94丨杀神白起，长平之战中的“草包”名将？（2） as the 齐国 minister who argues that Qi should lend grain to 赵国 during 长平之战. His core warning is strategic as well as moral: Zhao protects Qi and 楚国 like a shield or lips protecting teeth, so allowing Zhao to collapse will bring future danger closer.
The source makes Zhouzi a failed remonstrance case. 齐王建 / 田建 and 君王后 still refuse Zhao’s grain request, preferring short-term non-intervention over preserving an anti-Qin buffer. Zhouzi therefore anchors 屏障国救援失灵 rather than a successful rescue pattern.