If you want to submit to a mainland publishing house, you can refer to the following steps: 1. Confirm the publishing house you want to submit to and search online for the publishing method and related precautions. 2. Prepare the submission materials according to the requirements of the publishing house, including the original manuscript of the novel, the author's identity certificate, the copyright statement, the word count requirement, etc. 3. Submit the submission materials to the official website of the publishing house or the submission email and submit according to the instructions of the other party. 4. Waiting for the review results usually takes 3-6 months. The review results will be sent to the author by email or text message. 5. If the review is approved by the publishing house, the publishing time and process will be arranged and the manuscript fee will be paid. Please note that different publishing houses have different submission methods and requirements. It is recommended to read the instructions and requirements on the official website or submission email before submitting and provide as much detailed information as possible.