I have a main site /Capilia with different mciro sites

Hi I have a main site /Capilia with different mciro sites /Capilia/quebec for example. I'm planning to have 48 of them. What happening here is I would like to have same testiomonials here http://ozdev1.stratege-ti.com/capilia/galerie-temoignages/ in all my microsites. Some of the microsites will have addition testimonials they create them selves.

I was wondering if I modify the testimonials on the main sites, will the modification be shared with the microsites? and same thing if I delete a testiominals from the micrso site, I want it to be deleted on the different microsites too.

Thxs for your quick support.

Chiheb.