Long Siye was a general of the Upper Bound, and the Emperor Immortal highly valued him. He was very wealthy due to his position; therefore, his kitchen was supposed to be full of all kinds of nutritious food.
Since Lu Wu's owner was injured, she should be consuming a lot more supplements and nutritious food. Long Siye, as the friend and host of its master, should serve her at least a dozen nice and tasty meals. However, what was served every day were plain rice, veggies, and radish! There was no taste and no nutrition in these dishes. How could its owner swallow them down?
Both the mussel and Lu Wu were somewhat disappointed for their master. However, if they complained to their master, even if their master did not speak out, she would definitely feel sad; that was not good for her recovery. Therefore, mussel and Lu Wu had been holding back their emotions.