There are many mung bean cake shops in Tongan, Xiamen, each with its own unique taste and style. The following are some popular mung bean cake shops:

1. Xiamen Tongan Mung Bean Cake: This is one of the most famous mung bean cake shops in Tongan area, with a long history and reputation. The store's mung bean pancakes are crispy, filling and sweet, making them very popular.

2. Xiamen Tongan Wu Zaitian Mung Bean Cake: This is a time-honored mung bean cake shop that has won the favor of many diners for its unique taste and quality. The store's mung bean pancakes are crispy on the outside, soft on the inside, and rich in texture.

3. Xiamen Tongan Lu Auntie’s Mung Bean Cake: This is a family-style handmade mung bean cake shop with pure taste and delicious taste. The store's mung bean cakes are filled with a variety of flavors, such as mung bean paste, red bean paste, taro, etc., and are very popular.

4. Xiamen Tongan Shixun Mung Bean Cake: This is a mung bean cake shop located in Shixun Village, Tongan District. It has won the favor of many diners for its unique rural flavor and handmade craftsmanship. The store's mung bean pancakes are crispy, plump and sweet.

The above are some popular Xiamen Tongan mung bean cake shops. Each one has its own unique flavor and texture. You can choose according to your own taste and preferences.