Muaj lwm qhov kev tshawb xav txog kev tsim" Tsov", uas tseem muaj feem xyuam nrog huab tais. Raws li cov lus dab neeg, hauv Western Han Dynasty," ya dav dav" Li Guang tua tus tsov tuag ua rau tus neeg tuag, thiab ua rau tib neeg pov cov tsov ua luam yeeb tooj liab, thiab nws tso rau hauv nws kom hais tawm qhov nws ntxub rau tus tsov. Qhov no yog keeb kwm ntawm lub npe" tsov" ;. Tab sis thaum tus huab tais ntawm Tang Dynasty zaum hauv Zaj Tsev Hais Plaub, nws tau hloov lub npe tsis hwm mus rau" tsiaj nyaum" lossis" nees" tsuas yog vim tias muaj" lihu" ntawm lawv cov poj koob yawm txwv, thiab tom qab ntawd hu ua" tso zis tso quav" ;. Thiab" urinals" ;. Hauv kev txhim kho yav tom ntej, raws li peb tau pom, tsis muaj teeb meem nws hloov zuj zus mus, nws tsis tuaj yeem tshem tawm cov tsos ntawm lub phiab thiab kav dej. Nov yog qhov tshwm sim rau chav dej.
