Gong Cha Milk Tea Summer Promo Ginger Arboleda March 6, 2012 Featured, Food & Dining, Promos & Contests, Reviews It's been so hot lately. I have been mustering up the courage to stop temptations from Chowking and Cong Cha. But alas, I found this promo from Gong Cha! From February 20 to May 25, 2012, Gong Cha will be offering a promo of buy 10 drinks and get one free. The drinks should all be large.