bǐxīn

== Mandarin == === Romanization === bǐxīn (Zhuyin ㄅㄧˇ ㄒㄧㄣ) Hanyu Pinyin reading of 筆芯 / 笔芯, 筆心 / 笔心 Hanyu Pinyin reading of 比心 Hanyu Pinyin reading of 鄙心