Can the patent application documents be amended after submission?

When making a request for substantive examination, the applicant for a patent for invention may, within 3 months after receiving the notice of the substantive examination stage, take the initiative to propose amendments to his application for a patent for invention. An applicant for a patent for utility model or design may modify the application documents within 2 months from the date of patent application. However, the modification of the application documents for patents for inventions and utility models shall not exceed the scope recorded in the original specification and claims, and the modification of the application documents for patents for designs shall not exceed the scope shown in the original pictures or photographs.