dns.com.cn.lk-eb7db2.cloud-scdn.com. IXFR zone transfer

Changes since SOA version

IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.

Not an apex domain The domain dns.com.cn.lk-eb7db2.cloud-scdn.com. is not the root of its zone.
Instead, try zone transfer on cloud-scdn.com .