F. S. Brereton was known for his adventure novels, particularly those aimed at young readers. These novels typically featured daring protagonists who embarked on thrilling journeys set in various exotic or challenging locations. In the case of "Under the Chinese Dragon," it is likely that the story would involve a group of adventurers or a lone hero facing various obstacles, which might include encounters with local cultures, wildlife, and possibly even espionage or political intrigue. The title suggests that the story may be set in China, a country known for its rich history and diverse landscapes. Brereton's novels often combined elements of action, suspense, and character development, making them appealing to readers seeking excitement and adventure. While I don't have specific details about "Under the Chinese Dragon," it can be expected to follow a similar pattern of action and exploration that characterizes many of Brereton's works.