明白了，每个工作阶段都要公司出具的statement
Verifiable statements from your employers to support all your employment as IT professional.
Statements must be dated, signed by your employer or a person authorised by your employer (the name, position and contact details of the person making the statement must be clearly indicated) and must include details of the exact periods of employment and a full and detailed description of the nature and content of your work. Where possible, statements should be on company letterhead.