Nushu, meaning "women's script", emerged around 400 years ago. Barred from attending school, the women secretly learned Chinese characters and adapted them into Nushu, using the script to communicate with each other through letters, song and embroidery.

Passed down through generations of women in the remote and idyllic county of Jiangyong, it is now gaining popularity nationwide among Chinese women who view it as a symbol of strength.

Student Pan Shengwen said Nushu offered a safe way for women to communicate with each other.

"It essentially creates a sanctuary for us," the 21-year-old told AFP.

"We can express our thoughts, confide in our sisters and talk about anything."

Compared to Chinese characters, Nushu words are less boxy, more slender and shaped like willow leaves.

"When writing... your breathing must be calm, and only then can your brush be steady," Pan said.

On Instagram-like Xiaohongshu, the hashtag "Nushu" has been viewed over 73.5 million times -- mostly featuring young women sharing tattoos and other modern work incorporating the old script.

Student He Jingying told AFP she had been enrolled in a Nushu class by her mother and that writing it brought her "a deep sense of calm".

"It feels like when the brush touches the paper, a kind of strength flows into you."

- Against 'injustice' -

Nushu is more than just a writing system -- it represents the lived experiences of rural women from the county, Zhao Liming, a professor at Beijing's Tsinghua University, told AFP.

"It was a society dominated by men," said Zhao, who has been studying Nushu for four decades.

"Their works cried out against this injustice," she said.

The words are read in the local dialect, making it challenging for native Chinese speakers not from the region to learn it.

Teacher He Yuejuan said the writing is drawing more attention because of its elegance and rarity.

"It seems to be quite highly regarded, especially among many students in the arts," He told AFP outside her gallery, which sells colourful merchandise, including earrings and shawls with Nushu prints.

As a Jiangyong native, He said Nushu was "part of everyday life" growing up.

After passing strict exams, she became one of 12 government-designated "inheritors" of Nushu and is now qualified to teach it.

- 'Really special' -

An hour's drive away, around a hundred Nushu learners packed into a hotel room to attend a week-long workshop organised by local authorities trying to promote the script.

Zou Kexin, one of the many participants, told AFP she had read about Nushu online and wanted to "experience it in person".

"It's a unique writing system belonging to women, which makes it really special," said Zou, 22, who attends a university in southwestern Sichuan province.

Animation student Tao Yuxi, 23, one of the handful of men attending the workshop, told AFP he was learning Nushu to gain inspiration for his creative work.

He said his aunt was initially confused about why he was learning Nushu, as it is not typically associated with men.

As it represents part of China's cultural heritage, Nushu has to be passed down, he said.

"It's something that everyone should work to preserve -- regardless of whether they are women or men."