LiLei and Han MeiMei were the two main characters from a series of middle-school English textbooks used by Mainland Chinese students in the early 80s. I've unearthed a small wave of nostalgia about them online, including speculations on their love triangle with Englishman Jim Green and an annotated cast of characters.
Then some artists converted retro nostalgia into modern art, kitsch and a roadshow:
Interestingly enough, they also gave named them 李磊 and 韩美美 as they described in one of their first blog posts:
"他们没有中文名，我就先这样叫他们。试试看反响如何？大家有新意见么？ (They don't have Chinese names, let's call them this for now and see what the reaction is? What do you think?)"