2. At present, there are two ways: (1). The safest way is to directly inject Bianxingqingmycin for a course of treatment (once a week, two tablets each time, each tablet 120 unit for three weeks), that is to say, whether it is the infectious period of syphilis or not, it will be relieved after treatment; (2) From now on, check RPR every one to two months and observe the change of titer at any time. If the titer is always negative, no further treatment is needed; If the titer rebounds by more than two titers (that is to say, the lowest one you re-examine now is negative, and the re-examination result is 1: 2 or above), treat Bianxingqingmycin immediately.