Bully her back
Yu Dong only suspected that she might not have gotten any cooking oil with her ration but when Shen Li walked to the room where they have kept the extra ration and rummaged through the grains he was surprised to find that there was indeed no cooking oil in the ration since Yu Dong had a lot of fine oil in her space, they did not have to worry about cooking oil and they did not pay attention to it at all.
In fact, the grains and noodles that Yu Dong brought with her were too much and they completely forgot about cooking oil which only came in handy when they were cooking, it was only now that the matter of the cooking oil was dragged in the front did they realise that there was indeed no cooking oil in the list of ingredients that Yu Dong has brought with her!