Zhuge Liang's sixteen-base strategy means that if you want to (consider) its advantages (among them, or specifically something), you must (must) consider its disadvantages (disadvantages). If you want to consider its success, you should consider its failure. It means that if you want to consider the advantages of a thing, you must first consider its disadvantages. If you want to consider the success of a thing, you should first consider its failure, which reflects that everything has two opposing sides. There are advantages and disadvantages, and there are possibilities of success and failure.