how do you manage your kids mother tongue fluency?

[NewtonsAdamsApple]

hello fellow parents, I'm wondering how you make sure your kids are fluent in their mother tongue?

my husband and I try to mix in spoken Chinese when we communicate with our kids but it doesn't seem to have a great effect because:
1. our Chinese isn't that fluent in the first place
2. they watch mostly English media

so please share if you have any tips.

My kid isn't exactly fluent in his mother tongue but he's better than how he'd be if there's no YouTube.

My kid and us have a shared Google/YouTube account so my wife and I will add Chinese videos to the playlist for him to watch. Not just from the PRC but also TW, SG, MY. Basically, family and kid-friendly videos that he can enjoy and learn Chinese at the same time.

Some videos are even bilingual, which can make things easier especially if your kid isn't super fluent like mine.

An example: