The Antique Bureau's games 1 and 2 were written by the same author, so they were related. In the novel 'Antique Bureau in the Bureau', the main character Fang Yuan solved a series of cases by searching for antiques. In the novel " Antique Bureau, Middle Bureau 2 ", Fang Yuan continued his adventure and joined a mysterious organization that was looking for missing antiques. Therefore, it could be said that the series of novels of The Bureau of Antiques was closely related to The Bureau of Antiques 2.