What is the definition of "horizontal competition" in the listing rules of HKEx?

Horizontal competition means that the business of a listed company is the same as or similar to that of its controlling shareholder (including absolute holding and relative holding, the former refers to holding more than 50%, and the latter refers to holding more than 30% but less than 50%, but the shareholder has a controlling influence on the listed company due to the decentralization of equity), actual controller and enterprises controlled by it, and the two parties constitute or may constitute a direct or indirect competitive relationship.