"Yesterday Reappears - Exhibition of Centenary-Old Objects" Introduction: "Yesterday Reappears - Exhibition of Centenary-Old Objects" focuses on the collection of old objects from the 20th century that the museum began to collect from the public in 2011. The objects are all sourced from ordinary people. They may seem ordinary, but they contain profound meanings. They have witnessed the magnificent national rejuvenation, carried the ever-changing social changes, and recorded the processes of different historical periods.