chubby at 60 kg??

What ? No.. 60 definitely is a no.. your bmi is 20 but most asian standard is below 19. Yes 20 is healthy but doesn't look ideal. You know normal healthy bmi is min at 18.5. i'm 156 cm with 48kg and my arms also legs look so big.. if i weight 60 that will be fat overweight and not chubby anymore (well, bmi says it's normal but you'll look fat af and will get bullying here n there). I at least have to weight around 45 to get ideal weight. i often called fat by my aunt and other relatives. Compared to my pretty sister she's 155 with 36kg.. i have a long way to became like her.
I know it's late.. but i just wanna rant

First of all, I'm sorry about your family. No one should be called fat because of an unideal (but real) figure. By all standards you are fine. (not great, not awfull, fine...)
second, a healthy weight it's a range (from 18,5 to 24 in BMI), I know getting thinner is more aestethically appealing but if we forget that it is a range with a minimum healthy weight we get lost in perpetual dieting and always thinking we are fat.
Also general weight doesn't mean that it is fat or muscle or even if it's well dispersed, I'll concede that point. you can lose weight but you don't have to, you should have the option to be content in your own weight if it's within a healthy range, not the obligation to weight as little as possible in search of an ideal weight or figure under threat of bullying
And finally, your sister is definetly under weight (and that can be risky health-wise) you don't have to be like her you can be you, and be the prettiest you with the big arms and the big legs. What I find very unhealthy is the restrictiveness of the eastern beauty standard despite the fact that there are various body types