Does Kaiyuan know that he is a cp?

Karry knew this cp because Kaiyuan Powder admitted it. When he signed kaiyuan powder to him, it proved that kaiyuan powder really existed. Moreover, at that time, he personally signed his name and sent his blessing.

Related information:

Roy and Karry recently attended a music festival as singers, and their seats are still together. Spreading sugar on the spot made fans look forward to the early broadcast of the recorded award ceremony. Roy's new song "Answer" not only attracts public attention, but also implies CP sugar. Kaiyuan originally had a soundtrack "Answer", and the voices of two boys were exactly the same as those of Karry and Roy.