it's not necessary. if you don't want greasy food for yourself, you can change it to light food. You can use broth, or you can make it with clear water if you don't like broth. It's also good to make it with three fresh foods. Another way is that the soup in hot pot is generally better than white soup. If you use clear water instead of broth, it won't look fragrant. At this time, we can use vegetable fat light milk, which is commonly called Sanhua. The brand suggests that you use Nestle. This is our usual method.