One of Beijing's hidden gems is a store you'll find in the city's iconic hutong buildings. Open for nearly 40 years, owner Jin Anguang, 72, made and sold colorful Chinese calendars. They featured images of the country at different stages since its reform and opening-up in the late 1970s. With a space of just about 20 square meters, Jin's shop was filled with calendars collected from all parts of China in many different years. He only had three to five costumers per day, but was still committed to his job.