This book is also available at Amazon cheap, and in Kindle ebook.
I particularly like how this book teaches lessons in essential Chinese vocabulary. (For more details and resources see China Composition Wiki here). Loyal is on the cover, and the idea of duty and loyalty plays heavily in the plot.
Again, the savage and senseless excesses of the cultural revolution cast an ominous shadow over the tale, in which Inspector Chen flirts dangerously with a hot young American Fed.
Gangters, and or Triads, play heavily in this novel.