Cài Yōng 蔡邕 (132–192), zì Bó Jiē 伯喈, native of Yǔ 圉 in Chénliú 陳留 (modern Hénán), was the foremost late-Eastern-Hàn polymath: classicist, calligrapher, fù-poet, musician, astronomer, and ritual specialist. As a yìláng 議郎 he led the cutting of the Xīpíng Stone Classics 熹平石經 (175–183), the first state-sponsored stone redaction of the Five Classics. After the death of Língdì he was rehabilitated by Dǒng Zhuō 董卓, given the TàiWèi office and made Zuǒ Zhōnglángjiāng 左中郎將 (whence the conventional title Cài Zhōngláng 蔡中郎). After Dǒng Zhuō’s assassination in 192 Cài was condemned to death by Wáng Yǔn 王允 for sighing at the news; he died in prison the same year. His only surviving daughter Cài Yǎn 蔡琰 (Wénjī 文姬) became one of the great women writers of the Hàn. Standard biography in Hòu Hàn shū 60B; collected works survive only in the patched recension KR4b0002 Cài Zhōngláng jí 蔡中郎集. The catalog meta gives 133 as Cài’s birth year; CBDB and most modern scholarship give 132 (calculated from the Jīnshāngmén memorial, in which Cài states that he is 48 in Guānghé 1 / 178 CE), followed here.