How did Regency work in China (forbidden city)?

Jul 2019
When a new emperor came into being, sometimes they were babies/children. Obviously babies don't rule or make any decisions for a community. I was wondering how China had dealt with this issue in the past. For example: Pu Yi. Did they have a regent system like that of ancient Egypt where the mother would rule temporarily? Or did they have something else? Who made the decisions when Pu Yi was just a kid?
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