The data center of the Institute of High Energy Physics, Chinese Academy of Sciences(IHEP,
CAS), stores a large number of experimental data from major scientific instruments such as the
Jiangmen Neutrino Observatory, which are transferred and backed up among the collaborating data
centers. IHEP Data Center upgraded the transfer link between IHEP and GEANT from the original
10Gbps to 100Gbps, LHC Open Network Environment as part of link, its network has also become
better. In order to prevent large-scale transfer failures and ensure transfer quality, it is necessary
to conduct transfer tests to understand the transfer performance. In the previous transfer tests,
only multi- parallel transfers using "gfal-copy" were conducted, without high-bandwidth testing or
utilizing the CERN File Transfer Services for transfers in a real transfer environment. This leads
to a lack of understanding of the actual application bandwidth situation after the network upgrade.
To solve this problem, we have done data transfer challenges and tests. This study introduces the
previous data transfer challenge, large bandwidth transfer test, and data transfer challenge in a real
transfer environment. We developed a data injection tool for the data transfer challenge in a real
environment. Using this tool, we can adjust the data transfer volume and the intervals between
data transfer, among other parameters. The results of the data transfer challenge were viewed
through transfer monitoring deployed at IHEP.