create custom single post for specific custom post type

Hello

we have a custom post type let say name “wedding-package”
and then we want to all the single post under CPT “wedding-package” will looks like different from default single post

i have read about single post template API here (https://forum.tagdiv.com/api-single-template-introduction/)
but from my opinian, its will change all the post include all CPT

but in this case i want on my CPT, to have different layout singe post

can someone help me to achive this ?
i already using plugin toolset content template and it not work because newspaper 7 override the single layout

thanks