It depends on the situation~ If your trademark is similar to his trademark and your business structure is similar, it will still be considered infringement. If it is completely different and the business structure is different, it is not considered infringement. For example, you will be clearer; McDonald's has a red M with yellow letters, and if you turn it upside down and change the background color and letter color, it is not an infringement. But if you don't change it, and you are also selling burgers here, the scale will be comparable. When McDonald's is big, you get sued.