第(dì)
Ordinal numbers in Chinese are formed by placing 第 before cardinal numbers.
Ex) 第二杯茶,第三个月
However, 第 is not used in the names of months. Neither is it used to indicate the birth order of siblings.
Ex) 第二杯茶,第三个月
However, 第 is not used in the names of months. Neither is it used to indicate the birth order of siblings.