The general content is how a new (NC21) wall CP was born in the Avengers Building during the captain's mission.
The background can be regarded as a semi-AU, where all members are friendly and harmonious, and all internal conflicts within the Avengers either do not exist or have been resolved.
All the members (or most of the people) pranked Xiang, and the joke came from a cross talk "Ma Ji laid an egg" that I heard a long time ago. It was probably a rumor that was passed down by rumors and then turned into the cross talk about Ma Ji laying a goose egg.
There is no difference between the main CP Shield and Winter Shield, which may include Jani. There is no mention of other CPs... If someone insists on talking about some CPs, I will not object anyway. Pseudo Winter Iron, I may still love Winter Iron in other articles or imagination, but this Winter Iron is not true.
Conception: