For a 4-year-old child, it is generally not necessary to make an appointment or provide identification (such as an ID card) beforehand. In China, children under the age of 16 are considered minors and do not typically need to present any form of identification unless required by specific regulations or laws.

However, it’s always best to check with the relevant institution or organization in advance if you’re unsure about their requirements for a minor child. For example, some medical clinics or government agencies may have special procedures or forms that parents/guardians need to complete before bringing their young children along.

In general, it’s usually sufficient for an adult accompanying the 4-year-old (e.g., parent, guardian) to provide identification and make any necessary arrangements as needed.