1. First look at the appearance of durian. Generally speaking, yellow means ripe, and green means raw.

2. Use two fingers to squeeze the two thorns of the durian toward the middle. If your hands feel elastic and the two thorns can be close, it means it is mature.

3. Hold the durian and shake it next to your ears. If there is a thumping sound inside, it means it is ripe.

4. Smell it with your nose. If there is an obvious aroma, it means it is mature.

5. Look at the tip of the durian. If there are fine cracks, it means the durian is mature and edible.

6. Insert a sharp object into the tip (bottom) of the durian. If there is a slight popping sound, it means it is ripe.