- Dongark (Dong/Hyuck and M/ark)
- MarkChan (Mark and Hae/Chan)
- MaDong (Mark and Donghyuck)
- Both are part of the sub-unit NCT 127 and NCT DREAM
- Both were SM Rookies.
- Mark was born in Canada whereas Haechan was born in South Korea.
- Mark debuted first with the sub-unit NCT U in April of 2016, while Haechan debuted later on with NCT DREAM in August of 2016.
- Mark is in the sub-unit NCT U while Haechan is not (Edit: Haechan debuted in NCT U in December of 2019).
- Mark was born in 1999 while Haechan was born in 2000.
- Mark is a Leo and Haechan is a Gemini.
- Mark graduated from NCT Dream (Update: Mark will regroup with NCT Dream after their last comeback as six in late April 2020 as SM will let Dream have a rotational format similar to NCT U)
- They are part of the South Korean boy group NCT .
- Both attend School of Performing Arts (SOPA). (Formerly)
- They used to not get along at all.
| To view the MarkHyuck gallery, click here.
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