Episode 9 of Em xinh say hi opens with the theme of a school, where singers study in the same class led by "teacher" Tran Thanh.
Each "beautiful sister" carries in her pairs souvenirs from her school days. Many humorous stories delighted the audience such as Lam Bao Ngoc with brains, Miu Le with oral hygiene equipment, Tien Tien with a grassy scarf...
After a period of bringing laughter to the audience, Tran Thanh announced that the 4 people with the highest scores in livestage 3 will become the next team leaders, including: Phuong Ly, Lam Bao Ngoc, Bich Phuong and Ly Han.
Neither Lam Bao Ngoc nor Ly Han have ever taken on the role of captain. Lam Bao Ngoc in the previous round attracted attention with her high-song singing ability and boldness in performance, while Ly Han was a potential contestant with consecutive high ratings in recent episodes.
In particular, Ly Han surprised everyone when he rose to 1st place in the individual vote. This result shows Ly Han's remarkable rise in rank after only 3 rounds, from a little-known rookie to the top 1 of livestage 3.
This result helped Ly Han surpass a series of famous names such as Bich Phuong, Phuong My Chi, Phuong Ly...
In contrast, the 3 lowest-ranked people were Bao Anh, Quynh Anh Shyn and Vu Thao My.
Tran Thanh revealed that the rules of livestage 4 are harsher when contestants are allowed to choose people to pair with them, and if the pair has a dangerous rating, both will be eliminated.
Based on the previous livestage's rankings, the singers divided into two groups: A is an excellent student, B is a good student. Block A includes Lyhan, Bich Phuong, Lam Bao Ngoc, Phuong Ly, My My, MaiQuinn, 52Hz, Phao, Miu Le, Juky San, Liu Grace and Phuong My Chi. Block B includes Orange, Tien Tien, Lamon, Saabirose, Chau Bui, Bao Anh, Vu Thao My and Quynh Anh Shyn.
Despite her decline in ranking, Tien Tien is still chosen by many colleagues when receiving 5 letters of invitation to pair up. Liu grace broke through and received 5 invitations even though she was chosen last many times in previous livestages.
Phuong My Chi, My My, Orange and Quynh Anh Shyn all received 3 letters. Miu Le, Saabirose, Phao and 52Hz received 2 letters. MaiQuinn received an invitation. Those that no one chose were Vu Thao My, Chau Bui and Bao Anh.

After the time of selecting members, the teams in livestage 4 were completed, respectively Lam Bao Ngoc team (Phao, Phuong My Chi, Saabirose, Liu Grace), Ly Han team (MaiQuinn, Bao Anh, Miu Le, Tien Tien), Phuong Ly team (52Hz, Vu Thao My, Chau Bui, Orange), Bich Phuong team (USA, Quynh Anh Shyn, Lamoon, Juky San).
After that, the 20 singers went through games to accumulate points for their teams.
In the end, Lam Bao Ngoc's team was ranked first, Ly Han's team was ranked second, Bich Phuong's team was ranked third, and Phuong Ly's team was ranked last. Thanks to this ranking and score, the teams will have the advantage of choosing demo songs.
According to the selection results, Lam Bao Ngoc's team chose the songs "Bad Liar" and "Duyen"; Ly Han's team had 2 songs "Lam dong", "Tinh yeu"; Bich Phuong's team won the songs "Bac thang len hoi anh troi" and "Cach di"; 2 demos "Cu do xuong mua" and "Chu phai anh dau" belonged to Phuong Ly's team.