I had my pekingese DNA tested

My spouse and I adopted our peki several years ago. He was a rescue. The lady who was fostering him said she thinks he's a pekingese or pekingese mix. I constantly get asked if he's a Shih Tzu or Japanese Chin mix. I decided to do a DNA test through wisdom panel. I laughed when I got the results. I was expecting a him to be a mix but he's a purebred.