(Seolhyun's Instagram)

AOA member Seolhyun wrote a long thank you letter to fans on Instagram on Wednesday.

She expressed her gratitude toward her fans and those who helped her.

(Seolhyun's Instagram)

“Hello, this is Seolhyun. I get to write a letter every year on my birthday. I am writing this letter in the hope that I can show my gratitude toward those who cheer me on to be happy,” Seolhyun said.

“Regardless of how busy I was on my birthday, I’m so grateful to be able to spend my birthday with so much love.”

By Jie Ye-eun (yeeunjie@heraldcorp.com)