Oh to be sure. Just questioning the reasoning behind following the diet of someone who, with the best will in the world, has missed out on the last 49 years (ye gads I am old!) of science, research and nutrition developments.
I can't tell you anything about Bruce Lee's diet, but if you want to be in good shape, you should have a good diet and also practice sports every day. Many ways can help you lose weight and look better. You can start by following a healthy diet and running at least three times weekly. Also, to track your progress, you can buy a smart scale , I have used a scale (Advertising specific company deleted) for more than one year, and it works awesome.