If the liver function is normal, you can apply for a health certificate or engage in the catering service industry (it was not allowed before, but now the country has relaxed). If the liver function is abnormal, you can't get a health certificate. As the name implies, a health certificate means that all indicators of the human body are normal, which is health. Otherwise, how can you be healthy? As long as your liver function is normal, just like normal people, so is your health certificate! don't worry