On-the-job training with certificate and senior title. The selection of senior professional titles usually requires candidates to have certain academic qualifications and conditions, among which on-the-job training is one of them. On-the-job training can provide further professional knowledge and skills training to ensure that candidates can be competent for specific positions. On-the-job training is usually provided by relevant institutions or units, and corresponding training certificates or certificates will be issued. These certificates can be used as a part of the application materials for selecting senior professional titles, showing that candidates have received relevant training for specific positions and have corresponding professional knowledge and ability. The certificate of on-the-job training can be used as part of the application materials for the selection of senior professional titles, but the specific requirements may be different due to different regions, industries and professional titles.