Lu Jiang's goal was to find a plausible and sustainable source for the supplies that he had given to Feng Qingxue.
He and his comrades were the least likely to raise suspicions.
The reason he didn't stop his wife from using the supplies from the space was that he didn't want his wife and their unborn child to live a life of scarcity, full of nutritional deficiency, which could lead to countless adverse effects. He had witnessed the horrors of people resorting to infanticide to survive hunger, and many people's faces were swollen and terrifying.
Besides, he didn't want his aging father and frail nephew to live in poverty while he was serving the nation.
If there was a chance to improve life, why not seize it?
Having faced death numerous times, Lu Jiang was always open-minded about this.