Okay kiddo, let me explain to you what the House of Zhao is.
You know how in some really big families, there are many different groups with their own last names? Like the Smiths and the Johnsons and the Carters might all be related, but they each have their own family group within the family?
Well, the House of Zhao was kind of like that, but in ancient China a long long time ago. It was one of the big groups of people in the country, and they all shared the last name 'Zhao'.
They were really important because they had a lot of power and influence in the government. Back then, the government was run by a bunch of different clans--kind of like different big families--and the House of Zhao was one of the most powerful ones.
But even though they were powerful, they were also kind of in competition with other big families for even more power. So sometimes they would argue and fight with each other to try and become even more important and take control of the government. This was a long time ago though--nothing to worry about now!