Duty job include Inquiry / price ratio, signed a purchase contract, inspection, evaluation and feedback ect.

负责公司采购开发工作。包括询/比价、签定采购合同、验收、评估及反馈汇总工作；

youdao

Just like in an election campaign, if you convince the decision-makers (be they voters or hiring managers) that you can fulfill your promises, you get the job (or contract, investment, stock price, etc.).

FORBES: Obama and the High Cost of High Expectations