Proposals are hereby invited to conduct a public opinion telephone survey with participants. The service provider will be required to conduct supplementary telephonic interviews with 200 participants, which will take an estimated average of 20 minutes each. The HSRC will supply the service provider with the questionnaire that is to be used for the survey supplement. The participants interviewed must be selected in accordance with the following key variables: • Population group; • Age group; • Education level. Please confirm the contract number as two contract numbers were published. (投標 №75677882cn)