wedding ceremony and reception

[Mrxkms]

the following context is from an ethnic wedding ( Indonesian )

"The times of the wedding ceremony and the reception are both on the invitation.
However, you shouldn't go to the ceremony because its only for close family. If you really want to see it, you should ask first.
Everyone can go to the reception afterwords."

what is ethnic first ? is it cultural or what ?
concerning the wedding ceremony and reception, isn't the reception a part of the wedding ceremony?
doesn't the reception in this context mean to receive the guests invited to the wedding?

in our culture the reception is an integral part from the wedding ceremony itself.

Is it a matter of cultures ?
please help me understand this context

[Milanya]

[Mrxkms]

thank you Milanya
You did helped me

[Milanya]

Glad to be of service.
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con·text - The part of a text or statement that surrounds a particular word or passage and determines its meaning.