You, as the second person, are translated in ancient Chinese as: Er, etc.
And they, as the third person, strictly speaking, there is no real third person pronoun in Pre-Qin Chinese , generally carried by the demonstrative pronouns "qi" and "zhi".
In addition, in ancient Chinese, the singular and plural personal pronouns are the same shape. Sometimes, the first person pronoun and the second person pronoun can be added with "循", "genus", "cao", "generation", "etc." to express the plural. These words are different from the modern Chinese "men" in that they are words, not word endings. Therefore, "they" is translated into XX people according to the context