Gu Xijiu fiddled her fingers a little bit when she thought of the answer. She was a trained killer, so she was used to surviving in the wilderness. A necessary skill to do so included cooking. She did not enjoy cooking initially. Hence, her culinary expertise was just average. But there was a time when she was on a mission with Long Xi, and he caught a fish, so she cooked it. It was a terrible attempt, and Long Xi was almost poisoned from the meal!
After that, she diligently practiced all sorts of culinary skills. She was intelligent, so as long as she practiced assiduously, there was nothing that she could not learn. She practiced it repeatedly and finally; she was as good as an expert chef. She then purposely invited Long Xi for a meal. Long Xi ate it and was naturally impressed. He praised her resourcefulness and efforts. After that, the two always barbecued together when they were free. He caught the fish; she cooked it.