This is an activity under the "Dong Hac Say Hi" project launched on March 4, with the song "Anh Trai Say Hi".
The Choir will check-in with the brothers on the Anh trai say hi stage at the 5th concert, preserving the memories of the audience. In addition, the fans' arms will create a " say hi paper flare" in this concert night.
By March 15, more than 1 million paper sell-ins along with many handwritten letters from fans from all over the country and from abroad had been sent to the show.


The atmosphere became even more exciting when the brothers Isaac, Duong Domic, Nicky, Duc Phuc, Erik, Quan A.P, Cong Duong, Captain Boy, Song Luan, Hung Huynh, Hai Dang Doo, Ali Hoang Duong... signed to keep memories with the same Arsenal and interacted with fans.
Notably, Pham Anh Duy was the first brother to successfully fold the paper at the fastest speed and take a check-in photo with a "heart of a flock".
Coming to check-in with the same Arsenal, Duc Phuc and Erik fixed each signature, showing appreciation to each wing of the fans.
Mr. Quang Hung MasterD quietly came to support the project. RHYDER took the opportunity to call on the audience to dress up in the Spring Summer style.
The special edition of the 5th night of "Anh trai say hi" concert, in gratitude to fans, will take place on March 21, 2025 at Van Phuc City, Thu Duc City, Ho Chi Minh City.