Since March 2, 2021, 16 times, the sm.cn availability has been analyzed over the course of 1 661 days. Sm.cn consistently has shown functionality 16 times, with the latest recorded uptime on June 9, 2025, resulting in a code 200. Sm.cn had zero instances of inaccessibility, according to tests conducted as of September 19, 2025. Based on the responses received, it has been confirmed that there were no errors as of September 19, 2025. Data indicates sm.cn responded in 4.501 seconds on June 9, 2025, against its 4.595 seconds average.