What is the time when people who are reincarnated from Huoying filth are counted?

Generally speaking, people who are reincarnated from filthy soil are what they are when they die.

Bai didn't grow up.

Bai was 15 years old when he died, and his height was 156cm. The second part did not change when he was reincarnated.

The four Yin Ren people were not reincarnated by filth. Except these four people, only Kimimaro was reincarnated by filth. The animation you saw in which Yin Ren's four people were reincarnated by filthy soil is an original animation plot, which has nothing to do with Kishimoto Masashi's original comic plot, just to enrich the plot. Therefore, it is understandable that there are unreasonable places. For example, the current originality is a bit contradictory to the previous plot. For example, Payne's female beast Dao also came to Konoha village to take the first test of new forbearance. There must be many people who have seen her. Plus, Gang Shou named the candidates in Yuyin village to monitor the female beast Dao. The ninja in Konoha village should have an impression on this female beast Dao, but in fact, the time was pushed back. When Payne attacked Konoha, no one had seen this female beast Dao before. This is the contradiction between the original animation and the original plot.

Dead people don't grow up, so generally speaking, people who are reincarnated from filth are in the last state before they die, with the exception of Spot. Spot was very old when he died, but he was young when he was reincarnated. As for this, Dou himself explained that spot's filthy soil was specially prepared by him, so it was different from others'.