[dropcap]E[/dropcap]xcitement about the 2013 opening of Pak Pak, a Thai joint by the folks behind adorable Vietnamese hideaway Susu (plus new partners), was muted slightly by the fact that the restaurant was in far-flung Tianjin Wangjing. Well, prepare to get fully excited and bid a galangal-infused welcome to Pak Pak Central Park in the heart of downtown Beijing.