First of all, you spend a lot of money practicing Sanda and Jiu Jitsu. Why hasn't your weight changed? There may be two reasons. The first point is that you may eat a lot of food and supplement more. On the other hand, it is equivalent to reaching a balance. Second, practicing Sanda and Jiu Jitsu can increase muscles. When you reach a balance between fat consumption and muscle growth, you will not lose weight!
In your case, when diet and fat consumption and muscle growth reach a balance point, the weight will not change!
In terms of diet, I will give you some guidance: First, eat well in the morning, mainly high-protein foods such as milk and eggs, eat full at noon (if you are impatient, you can eat seven points full), try to eat less greasy, fried and other foods, and eat less at night, mainly fruits and vegetables!
Note: You can only do exercise one hour after meals! Manual adoption is not easy!