Qr19.cn underwent 9 uptime tests during the 299 day time frame starting on February 2, 2024. On August 3, 2024, qr19.cn was operational with a 200 status code response, as part of 9 instances of uptime out of total checks. All tests conducted as of November 27, 2024, confirmed that qr19.cn did not experience any periods of inoperability. The status of all received responses has been noted as error-free as of November 27, 2024. The latest data indicates that qr19.cn responded in 0.779 seconds on August 3, 2024, in contrast to the average of 1.723 seconds.