There is always a stink in my bathroom. I always turn on the exhaust. Can't find the reason. I have blocked the floor drain, but it still smells. What should I do?

1, the toilet is not installed firmly, and there is water seepage around it, which makes the sewage leak to the outside;

2. If the toilet is used for a long time, it needs to be replaced, because the sewage seeps into the toilet after long-term use;

3, accidentally urinating and flying outside, not cleaned up immediately, need to be cleaned up;

4. The floor drain is not deodorized and needs to be replaced.