Generally speaking, the examination process of invention patents is as follows: filing an application-notification of acceptance-payment of application fee-preliminary examination-notification of conformity-publication within 0/8 months from the date of filing-filing an actual examination request and paying the actual examination fee-substantive examination (notification of opinions-statement of opinions, which can be repeated)-authorization notice-payment.
The above is a relatively smooth process of invention patent examination. If there are various changes in the review, the whole process will also change accordingly.
Of course, you can also submit a "pre-disclosure request" and a "substantive examination request" at the same time when you apply, and pay the actual examination fee at the same time, so that it will be made public about six months after the application date and enter the substantive examination procedure.