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Tumor metastasis is one of the greatest hurdles for cancer treatment, which accounts for 90% of cancer-associated mortality.Nanodiamond (ND) presents many requisite properties of drug delivery system and is promising to deliver a wide range of therapeutics.Herein, ND loading insoluble sorafenib (SND) was used to enhance the oral delivery, and inhibit the liver and kidney metastasis of gastric cancer.