Think Think and Ah Tsai are two cats belonging to the President of Taiwan, Tsai Ing-wen. Think Think is a female gray tabby, while Ah Tsai is a male ginger tabby.

A tabby cat, or simply tabby, is any domestic cat with a distinctive M-shaped marking on their forehead, stripes by their eyes and across their cheeks, along their back, around their legs and tail, and characteristic striped, dotted, lined, flecked, banded, or swirled patterns on the body: neck, shoulders, sides, flanks, chest, and abdomen. The four known distinct patterns, each having a sound genetic explanation, are the mackerel, classic or blotched, ticked, and spotted tabby patterns.