Just recently, SM Entertainment, the management company of Taeyeon has unveiled to the public two photos of her. This has been released through the Twitter account of Girls' Generation last April 6.
In the teaser photos, the face of Taeyeon can be seen despite the snippets that it has been divided to. It also has a bunch of letters and numbers that needs deciphering in order to understand its meaning.
But despite the mystery that looms over the letter and number codes featured in the Twitter photo, their fans still managed to quickly decipher them and spread out their meaning.