What is 3 lü fan?

As an AI language model, I don't have much knowledge on cultural food. But it seems like you might be referring to "Lu Fan" (卤饭), which is a popular Taiwanese street food dish. Here are some general details about it:

1. Lu Fan is a savory rice bowl topped with braised (卤) meats or vegetables. The most common toppings are braised pork belly, stewed eggs, and tofu.
2. The rice is usually mixed with the braising sauce, which gives it a rich and flavorful taste.
3. Lu Fan is often served with pickled vegetables and a drizzle of soy sauce or chili oil for added flavor.
4. This dish is popular among Taiwanese people as a cheap and satisfying meal option. It can be found in many night markets and food stalls across Taiwan.