Chen Feng had certainly eaten black truffles before and had even treated them as staple food. He once had a mission in the Alps, where he dined on black truffles as the locals did, so it was no big deal to him.
In fact, black truffles in Europe are commonly used as a top-tier ingredient, ranking alongside caviar and foie gras as one of the culinary "Three Heavenly Kings." Due to their harsh growing conditions and extremely limited annual global production, their price is quite expensive, comparable to gold, and they are known as the "black diamonds" of the dining table.