The group of seven right here is:
the seven notes of Solfège in music: do, re mi, fa, so(l), la, and ti.
The primary member of this group of seven is DO. Two of them concatenated collectively (when ‘it joins palms with its twin‘) make DODO, an extinct chook (not there). Once we moreover add ‘MA‘ (a well-known Chinese language billionaire), we get DODOMA, the capital metropolis of Tanzania.