1. The number of MSM who are tested for HIV in the 4 study clinics over 12 months will increase compared with historical data from the same 4 clinics over the past 12 months prior to the intervention.
2. Persons diagnosed with HIV over the duration of 12 months will have higher CD4 counts at diagnosis than persons diagnosed with HIV over the past 12 months prior to the intervention

Inclusion Criteria:• Men who had sex with another man in the last 12 months based on self-reporting (sex can be defined as oral, anal, or mutual masturbation)(including transgendered women)（including transgendered women）;

• Aged 18 years or older;
• Living and/or working in the defined districts of municipal Beijing;
• Able and willing to adequately grant informed consent. For the purposes of this activity participants must consent to questionnaire surveys, receipt of phone messages, and serological testing;
• Having not previously participated in HIV testing in this study.

Besides these criteria, additional criteria for the HIV Linkage and Care pilot Research Clinical Trial are:

• Men who are being identified as HIV positive during the testing campaign in Phase I of the study;
• No plan to leave Beijing in the next 12 months.
• Willing to comply with study procedures.
• Having a cell phone and willing to receive study related SMS texts

Exclusion Criteria:

Having previously been found to be HIV positive based on self-reporting during eligibility screening;

• Serious psychological disturbance or cognitive impairment interfering with the participant's ability to comply with the study visit schedule and procedures, as judged by the local study clinician;
• Any other medical or psychiatric condition that, in the opinion of the investigator, would make participation in the study unsafe, or otherwise interfere substantially with the study objectives or interpretation.

subjects selected are living or working in Beijing China