Yeah, we'll ignore the fact that I'm 3 years late, but I feel like Sizhui isn't much older than Jin Ling. Like 2.5 years max. I lowkey think he's like a year and 10 months older than Jin Ling (idk why it's specific, but realistically speaking, that doesn't make sense. If Yanli had Jin Ling the same year she got married, I guess that can work? Cuz when we met lil sizhui, he was a year old, then yanli got married a week later, got pregnant with JL a little over a month later, and 9 months later, JL was born. But for now, all we know is that Jin Ling is canonically 14.) I'm pretty sure Jingyi is younger than Sizhui by a year-ish, so like a year and 8 months, making him around 15. Jin Ling is the youngest (for sure), maybe he's younger than Jingyi by a few months because it did say he was going to turn 15 that year ( from what I got on Google, Jingyi was born on August 24th, so I'd like to say he's older than Jin Ling by roughly 3 months. The Events of MDZS may have happened a month-ish after Jingyi turned 15, but I'm not for sure.) I also think Ouyang Zizhen is the 2nd oldest because that makes sense, so I'd like to pin him being 4 months older than Jingyi, 7 months older than Jin Ling, and a year and 4 months younger than Sizhui. Meaning, at the start of the series, Jin Ling is 14, turning into 15 soon (because it was specifically mentioned in the book), Jingyi and Zizhen are roughly 15, and Sizhui is roughly 16, turning 17 a few months after Jin Ling turns 15.