The cost of endoscopy is not exactly the same in each region. Generally, the cost of an electronic colonoscopy is 300 yuan, and the cost of an electronic gastroscopy is also 300 yuan. Currently, the more popular one is capsule endoscopy, which costs 3,900 yuan (please refer to the prices announced by the price bureaus of each region). Before the e-gastroscopy, it is important to keep an empty stomach and not to drink any water; the doctor will order to drink a lidocaine for throat anesthesia. The bowel should be emptied before the e-colonoscopy is done, and a laxative such as magnesium sulfate will be drunk to empty all the contents of the bowel before the colonoscopy can be performed. The precautions for capsule endoscopy are almost similar to those for e-gastroscopy, but be aware that the cost is relatively high and is an option for some people who cannot tolerate gastroscopy.