ZWPen.Com is an online service aiming to help English-speaking people learn the Chinese language. We are a team of native Chinese-speaking people who lives in the United States.
We published a series of Chinese Flash Cards authored by Dongxia Zheng. Occasionally we give away our Chinese Flash Cards to everyone who follow/like us on Facebook. Follow/Like us on Facebook so that you can get notified when we give away our Chinese Flash Cards.
If you have any question, you are welcome to contact us via this link.