Overview

• Zhang Guoxin and Hai Chao were surrendered for adoption at just 10 days old and grew up separately in Hebei province.
• At 17, a classmate’s tip led Hai Chao to spot Zhang Guoxin, sparking a friendship built on uncanny resemblances and shared birthdates.
• Fourteen months into their friendship, their adoptive families disclosed their twin relationship after initially concealing it to prevent potential birth-parent claims.
• Over the past two decades they have documented multiple coincidences—identical tastes, voices and even nearby home purchases—while their 13-year-old children attend the same school class.
• Marking the 20th anniversary of their emotional reunion, the sisters now engage more than 62,000 social media followers with their story.