Complex sentence: Mailman Group was established in 1999 (WHO was the founder) as Mailman China and focused mainly on postcard media, but the name and focus changed when current CEO Andrew Collins acquired the company in 2007.
Split into simpler sentences: Mailman Group was established in 1999 as Mailman China and focused mainly on postcard media. However, the name and focus changed when current CEO Andrew Collins acquired the company in 2007.