Martial Arts Crossover: Infiltrating a Girls' Chat Group at the Start

[Chat group + multiple female leads]
In the vast land of China, warlords held sway over their own territories, and military might was the highest virtue.
One year, during a great flood in the Yangtze River, Lin Zhu traveled through time and took possession of a body whose soul had just dissipated.
Just when he felt lost in life:
[Ding! Welcome to the girls' chat group]
Peach Blossom Chef (IP Donghai): Newcomer's photos! Do you know how to take selfies? Just click the top right corner.
Successor of the Holy Gate (IP Western Regions): Show me your photos, let me see if you're a young lady or a little sister.
Wushuang Wudui (IP Guanzhong): Don't scare the newbies, just say hello.
……
Looking at the rows of messages in front of him, Lin Zhu first gave himself a screen name—"Wearing Bamboo Leaves".
Chuanlin Zhuye (IP Gusu): Hello everyone.
I am my cousin's cousin (IP Gusu): @Chuanlinzhuye, you and I are in the same place!
Great Fairy (IP Gusu): I'm also in Gusu.
Lin Zhu learned about the structure of this world from the memories of her predecessor.
In the north there is Shaolin, the martial arts and Zen school; in the south there is Wudang, the immortal Zhang Sanfeng; in the west there is the Tianxia Society, which dominates the Western Regions; in the east there is the Jixia Academy, which inherits the teachings of the Hundred Schools of Thought.
This is a vast world of martial arts.
Looking at the group members again, why do their usernames feel strangely familiar?
Yearning to Walk (IP Beijing): @Chuanlinzhuye, newcomers can receive benefits by selecting three group members and drawing their martial arts skills.
I'm a woman disguised as a man (IP: Beijing Suburbs): That's right, remember not to tell anyone the martial arts you drew.
There are good people in the capital! Lin Zhu opened the group member list...