Tán Sì tóng
Tan Sitong (1865-1898), Qing writer and politician, one of the Six Gentlemen Martyrs 戊戌六君子 of the unsuccessful reform movement of 1898
qīng tán
blue sandalwood (Pteroceltis tatarinowii Maxim), the bark of which is used to manufacture 宣紙|宣纸