Group CSJH's Dana recently tweeted this�picture of her younger sister. Dana tweeted the photo with the following description,�"This is the first time I am introducing someone! This is my sister, Hong Sun Ah,�who holds all of the weird pictures of me. Please befriend her~" This picture of Dana's sister shocked the netizens because Hong Sun Ah looked exactly like Dana. Netizens commented with,�"They look exactly the same", "I could tell this was your sister when I first saw this", and "Both have such good genes". Source + image via �Star Today