1. Healthy subjects aged 60 years and above who were capable of providing legal identities. Both males and females should be included, 2. The subjects shall fully understand the content of the informed consent form and the study procedure of this clinical trial. The subjects shall voluntarily sign the informed consent form. The subjects shall be capable of using the thermometer and scale, as well as filling in the Diary Card/Contact Card as require, 3. The subjects shall be able to communicate well with the investigators, as well as understand and comply with the requirements of this study, 4. Female subjects with amenorrhea for at least 1 year or surgical sterilization verified by medical records, 5. Axillary temperature <37.3 degree C on the day of administration.

1. Healthy subjects aged 60 years and above who were capable of providing legal identities. Both males and females should be included, 2. The subjects shall fully understand the content of the informed consent form and the study procedure of this clinical trial. The subjects shall voluntarily sign the informed consent form. The subjects shall be capable of using the thermometer and scale, as well as filling in the Diary Card/Contact Card as require, 3. The subjects shall be able to communicate well with the investigators, as well as understand and comply with the requirements of this study, 4. Female subjects with amenorrhea for at least 1 year or surgical sterilization verified by medical records, 5. Axillary temperature <37.3 degree C on the day of administration.