* Deng Jia: This means that Deng and Chen are family and soul mates.

* Chen and Deng are inseparable: it expresses the inseparable relationship between Deng and Chen.

* Deng Chenyuan: It symbolizes the fate of Deng and Chen and expresses their deep feelings.

* Chen-Deng couple: It directly shows that Deng and Chen are lovers, sweet and romantic.

These are just some examples. You can create your own unique nickname according to your preferences and feelings.