Zhou Xin Yu (tripleS)

Who is Xinyu (tripleS)?

Zhou Xinyu (Chinese: 周心语; born May 25, 2002), known mononymously as Xinyu, is a Chinese singer and member of the South Korean multinational girl group tripleS under MODHAUS. Since 2023, she has been active as a member of tripleS and multiple sub-units within the group's structure, including LOVElution, Visionary Vision, and Sun.

Xinyu was revealed as S15, the fifteenth member of tripleS, on July 2, 2023. Following her announcement, South Korean entertainment company Modhaus officially introduced her as a member of the group's sub-unit LOVElution in July 2023. She debuted with LOVElution on August 17, 2023, through their first EP titled Muhan. On June 18, 2024, Modhaus announced her placement in another sub-unit, Visionary Vision, which subsequently debuted on October 18, 2024, with the EP Performante and its title track "Hit The Floor". On September 3, 2025, she was announced as the leader of Sun, one of four sub-units formed under the MSNZ project, which includes Moon, Sun, Neptune, and Zenith, with six members each.

Born in Beijing, China, Xinyu stands at 174 cm (5'8″) tall. Prior to joining tripleS, she trained under both SM Entertainment from 2016 to 2018 and Yuehua Entertainment. She attended Berklee College of Music for her education. Xinyu gained initial recognition through her participation in survival programs, appearing as a contestant on Mnet's Girls Planet 999 in 2021 and Youku's Great Dance Crew in 2022.

Xinyu's early career and trainee period

SM Entertainment trainee

The training period at SM Entertainment began in 2016 and extended until 2018, during which she trained alongside aespa's Ningning. Her introductory video for Girls Planet 999 garnered over 77,000 views within five days, with viewers noting the distinct SM Entertainment vocal training style evident in her singing.

Yuehua Entertainment trainee

Following her departure from SM Entertainment in 2018, she transferred to Yuehua Entertainment. The transition marked a continuation of her trainee period under a different management structure, though specific details about the duration of this training phase remain undocumented in public records.

Girls Planet 999 participation

In August 2021, she joined Mnet's survival program Girls Planet 999 as a Group C trainee. Her official profile was released on July 18, 2021. Throughout the competition, she participated in the third performance's limited unit "7 Love Minutes" and performed the single "U+Me=Love". During Episode 5, she ranked at C-14 individually, and by Episode 8, she had reached C-13 through a Planet Pass. Her final ranking placed her at position 22 overall and seventh within Group C (C07). The elimination occurred during the eleventh episode, which aired on October 15, 2021, following the third round of eliminations.

Great Dance Crew appearance

On April 8, 2022, she was confirmed as a contestant on Youku's dance competition reality show Great Dance Crew. The program, titled "Amazing! Dance Club Season 1" in some regions, featured her competing in team battles and choreography missions.

Xinyu's debut with tripleS and LOVElution

Reveal as S15

MODHAUS announced the addition as the fifteenth member of tripleS on July 2, 2023, during the BINARY 01 event. The reveal designated her as S15 within the group's numbering system. Subsequently, she became the final member announced for the LOVElution sub-unit. Her introduction expanded tripleS toward its planned 24-member lineup.

August 2023 debut

LOVElution debuted on August 17, 2023, with the mini album Muhan (ↀ) and the title track "Girls' Capitalism". The eight-member sub-unit, besides featuring her, included SeoYeon, HyeRin, YuBin, Kaede, DaHyun, Nien, and SoHyun. The group promoted themes of self-confidence and self-love through their music. The "Girls' Capitalism" music video garnered over 10 million views on YouTube within 48 hours of its release. Members were selected through Gravity Events via the COSMO interactive voting application, which allowed fans to participate in the formation process. The rapid success established LOVElution as tripleS' fourth sub-unit, following the group's decentralized structure where members rotate within voted-upon sub-units.

First North America tour

The Authentic tour brought LOVElution to North America from September 24 to October 14, 2023, spanning ten cities. The tour commenced in Atlanta and concluded in Los Angeles. When preparations began, members expressed particular excitement about visiting New York and Chicago, with specific interest in experiencing deep dish pizza in the latter city. On September 30, 2023, the group attended an event at Cafe Joah in New York City, where they interacted with fans. The tour represented the sub-unit's first international promotional activities despite having debuted mere weeks prior to departure.

Xinyu's sub-units in tripleS

Visionary Vision

On June 14, 2024, tripleS announced a new 12-member sub-unit called Visionary Vision (VV), which would focus on dance performance. The sub-unit formation combined fan voting for nine members with internal selection of one member to join Gong Yu-bin and Lynn, who were pre-selected. The final lineup announcement occurred on June 18, 2024, confirming her placement within the group. Visionary Vision debuted on October 23, 2024, with their first album Performante, containing ten tracks including the lead single "Hit The Floor". The 12-member lineup comprised Jeong HyeRin, Kim YooYeon, Kim NaKyoung, Gong YuBin, Kaede, Kotone, Kwak YeonJi, Nien, Park SoHyun, Xinyu, Lynn, and JiYeon. The sub-unit represented tripleS' ninth dimension and first dance-focused unit, with Jeong HyeRin serving as the primary leader.

Sun (leader position)

On September 3, 2025, tripleS announced the MSNZ project, which formed four sub-units of six members each: Moon, Sun, Neptune, and Zenith. Through an advance drawing of lots, she was determined as the leader of Sun. The leader selection process involved drawing a slip of paper with the letter 's' from a box. Between September 5 and 9, the remaining members YooYeon, Mayu, ChaeWon, ChaeYeon, and HyeRin were confirmed for Sun. The sub-unit debuted on November 24, 2025, with "Bubble Gum Girl" from the album Beyond Beauty, which featured all MSNZ sub-units. Sun's concept centered on warmth and nostalgia, wrapped in bright retro textures. Inasmuch as the promotion strategy involved showcasing different concepts, each six-member sub-unit operated its own track in parallel under the tripleS msnz umbrella.

Xinyu age, height, and personal background

Birth date and age

Born on May 25, 2002, she is 23 years old as of 2026. Her zodiac sign is Gemini, with a Chinese zodiac sign of Horse. She was born in Haidian, Beijing, China.

Physical attributes

Her height measures 174 cm, equivalent to 5'8" or 5'9". Weight records indicate 46 kg and 49 kg at different points. Her blood type is O, and her MBTI personality type is ENFP.

Educational background

She graduated from Capital Normal University Affiliated Middle School and attended Beijing 21st Century International School. She is enrolled in the Contemporary Theater program at Boston Conservatory at Berklee. Notably, she is currently on a leave of absence from her studies.

Personal interests and hobbies

Her hobbies include visiting amusement parks, eating, sleeping, watching movies, and acting. She speaks Mandarin and Korean fluently, with conversational abilities in English and Japanese. As a fashion enthusiast, she maintains an average screen time of 10 hours per day. She expresses strong interest in visiting Disneyland, reflecting her love for Disney, and has travel aspirations to visit Japan.

FAQs

When did she debut in tripleS?

The reveal occurred on July 2, 2023, when MODHAUS announced her as S15, the fifteenth member of tripleS. Her official debut followed on August 17, 2023, with the LOVElution sub-unit through their mini album Muhan.

Which subunits does she participate in?

She performs in multiple tripleS subunits, including LOVElution, Visionary Vision, and Sun. Within Sun, she holds the leader position, a role determined through an advance drawing of lots in September 2025.

What are her food preferences?

Her favorite foods include tteokbokki, chicken, pizza, beef tripe, intestine soup, short ribs, fruits, juice, cake, and bread. However, she dislikes mint chocolate.

What is her age and nationality?

As of 2026, she is 24 years old, having been born on May 25, 2002. She hails from Beijing, China, making her one of the Chinese members within the multinational group structure.

What controversies has she faced?

In July 2025, she came under fire for expressing support for the One China principle on the fan communication platform Fromm. She stated that Macau, Hong Kong, and Taiwan are part of China. When fans expressed concern about potential backlash, she responded by questioning whether her statements were incorrect and suggested that those who disagreed should not follow her on the platform. The comments aligned with the Chinese government's One China principle, which argues that mainland China, Taiwan, Hong Kong, and Macau constitute a single country under Chinese government rule. The statements generated backlash within the K-pop community, particularly as such political expressions remain taboo within the industry. MODHAUS did not release an official statement regarding the incident.