For a period of 1 246 days, 10 times, beginning on June 29, 2021, cda.cn was tested for availability. By successfully returning a status code 200 on August 31, 2024, cda.cn has shown functionality 10 times from total the checks attempted. Tests show that as of November 27, 2024, there had been no instances of cda.cn's inoperability. All received replies confirm that, as of November 27, 2024, there have been no responses with an error status. It is noted that on August 31, 2024, cda.cn responded in 2.453 seconds, and the average response time was equal to 3.083 seconds.