Sikang liu upenn email

I'm happy to help! However, I need more information to provide the correct email address for Sikang Liu at the University of Pennsylvania (UPenn).

Could you please provide me with the following details:

1. What is Sikang Liu's affiliation with UPenn (e.g., faculty member, researcher, student)?
2. Is Sikang Liu a current or former employee/student of UPenn?

With this information, I can try to find the correct email address for Sikang Liu at UPenn.