Regarding Xiamen Transit Visa

Hi
I just like to confirm, if a Transit Visa is still needed at Xiamen? or is it covered by 24hr free transit just like most of China?
By the way, we are Philippine passport holders and travelling to Canada, transitting at Xiamen both ways. Each Transit period is between 2-4 hrs.

I heard we still need to get Transit entry permits for these trips as have to clear immigration always?

Greatly appreciate any advice. Thanks.