The exhibition at the Hall of Martial Valor (Wuying dian) examines acclaimed paintings and calligraphy in chronological order from the third century to the early twentieth century. Accompanied with these masterpieces are entries focusing on the feature of the times, change of styles, major schools, and famous artists. Due to conservation requirements, the works will be changed regularly. As a continuation of last year\'s three rotations, the year 2009 also sees three rounds of the display: The 4th rotation lasts from 15 April to 15 June The 5th rotation lasts from 25 June to 25 August The 6th rotation lasts from 3 September to 1 November