After eight years in China, INGRID BOOZ MOREJOHN began a photographic “China Countdown,” recording her last 100 days in the country with one photograph posted online each day. These quirky portraits of Chengdu affectionately describe China as she came to know and love it during those years. The result is this penetrating collection of social media pictures: spontaneous and of-the-moment images that go straight to the heart of life.