Fans are celebrating Chen's birthday in a bloody way this year.

The EXO member celebrated his 25th birthday on September 21. To make the day even more special and memorable for the star, fans have started a blood donation project.

Fans across the globe shared photos of them donating blood with the sign 'blood donation with Chen'. The posts are shared on social media with the hashtag #HappyChenDay and #Blooddonationwithchen.

The idol expressed appreciation via official fan page, and stated, "Thank you for the birthday wishes. I was able to enjoy 2017 thanks to EXO-Ls."