OPENsi
Taiwan · Official roster: 4 (4 birthdays recorded)
OPENsi members from oldest to youngest: Leo (27), Justin (26), YY (25). The oldest is Leo, born December 14, 1998; the youngest is YY, born August 16, 2001. Birth years are on file for 3 of 4members.
Debut date: Next debut anniversary: May 13
Birthdays of all members
| Birthday | Member | Other spellings |
|---|---|---|
| December 14 | Leo 陳治廷 | — |
| December 16 Fan-submitted | WinZ 黃威任Win Z | OPENsi的黃威任WinZ |
| December 26 | Justin 陳子輇 | — |
| August 16 | YY 邱勝揚 | yy |
Roster source: Chinese Wikipedia: OPENsi (4 current members; consistent with Kprofiles) (retrieved 2026-09-25)
Age ranking of members (oldest to youngest)
We have full birth dates for 3 of 4 members (members with only a birth month and day are left out, since their age can’t be calculated). Ages update to today’s date.
| Rank | Member | Birthday | Age |
|---|---|---|---|
| 1 | Leo | December 14, 1998 | 27 |
| 2 | Justin | December 26, 1999 | 26 |
| 3 | YY | August 16, 2001 | 25 |
OPENsi Members’ Zodiac Signs
Only members with a known birthday are included. Sign boundaries: zodiac index
This page lists all 4 members on OPENsi’s official roster. 4 of them have their own page on this site (our inclusion rule: someone has held a support event for them, or a verifiable identity or birthday source exists). The rest are marked “roster only” and appear only in this table. Birthdays are listed only when we find a verifiable source; otherwise they’re marked “no verifiable source found.” We never fill gaps with guesses. Spotted an error, or have a verifiable official source? Email service@joelin.cc. (email us a report)
We’ve logged 1 support cases for this group’s members (the combined total of each member’s cases; see each member’s page for details).
Want to hold a support event for OPENsi?
Group support usually centers on debut anniversaries and concerts. Each member’s birthday is in the table above.
FAQ
- What are the birthdays of OPENsi's members?
- OPENsi’s official roster has 4 members. Those with a verifiable birthday on this site: Leo December 14, WinZ December 16(fan-submitted), Justin December 26, YY August 16. Each birthday’s source is cited on this page and on the person’s own page.
- How many OPENsi members are listed on this site?
- OPENsi: Official roster: 4. Of these, 4 have a verifiable birthday recorded on this site. This page lists all 4 members on OPENsi’s official roster. 4 of them have their own page on this site (our inclusion rule: someone has held a support event for them, or a verifiable identity or birthday source exists). The rest are marked “roster only” and appear only in this table. Birthdays are listed only when we find a verifiable source; otherwise they’re marked “no verifiable source found.” We never fill gaps with guesses. Spotted an error, or have a verifiable official source? Email service@joelin.cc.
- When was OPENsi’s debut?
- OPENsi's debut date is May 13, 2023, so every year on May 13 marks the debut anniversary. In other words, OPENsi’s debut year is 2023. The debut anniversary is one of the most common occasions for group fan support.
- What is the age order of OPENsi's members? Who is the oldest?
- We have birth years for 3 of 4 OPENsi members (members with only a birth month and day can’t be ranked by age). Ordered from oldest to youngest: Leo (born December 14, 1998), Justin (born December 26, 1999), YY (born August 16, 2001). The oldest is Leo, and the youngest is YY.
- What are the zodiac signs of OPENsi’s members?
- Based on their birthdays: Leo: YY; Sagittarius: Leo, WinZ; Capricorn: Justin. Signs use the month and day only, with the boundary dates explained on our zodiac pages.
View this page in Chinese → · Back to group index · Birthday calendar