七牛 CDN 租用又拍云的 CDN？

使用七牛 CDN，dig 网址，dig 出来了七牛的 CNAME，然后七牛的 CNAME 最终指向了又拍云的 CNAME ……
> dig my.domain.com


<< DiG 9.9.4-RedHat-9.9.4-50.el7_3.1 <<>> my.domain.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2138
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 3, ADDITIONAL: 14

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;my.domain.com.              IN      A

;; ANSWER SECTION:
my.domain.com.       600     IN      CNAME   idv09fu.qiniudns.com.
idv09fu.qiniudns.com.   600     IN      CNAME   tinyqiniu.b0.aicdn.com.
tinyqiniu.b0.aicdn.com. 300     IN      CNAME   nm.aicdn.com.
nm.aicdn.com.           3600    IN      CNAME   nm.ctn.aicdn.com.
nm.ctn.aicdn.com.       229     IN      A       117.27.142.28
nm.ctn.aicdn.com.       229     IN      A       150.138.216.175

;; AUTHORITY SECTION:
aicdn.com.              65007   IN      NS      ns1.ialloc.com.
aicdn.com.              65007   IN      NS      upgslb.cdncloud.org.
aicdn.com.              65007   IN      NS      ns2.ialloc.com.

;; ADDITIONAL SECTION:
ns1.ialloc.com.         573     IN      A       183.158.35.125
ns1.ialloc.com.         573     IN      A       58.87.87.159
ns1.ialloc.com.         573     IN      A       123.132.254.175
ns1.ialloc.com.         573     IN      A       139.199.17.218
ns2.ialloc.com.         573     IN      A       183.158.35.125
ns2.ialloc.com.         573     IN      A       58.87.87.159
ns2.ialloc.com.         573     IN      A       123.132.254.175
ns2.ialloc.com.         573     IN      A       139.199.17.218
upgslb.cdncloud.org.    3523    IN      A       183.158.35.125
upgslb.cdncloud.org.    3523    IN      A       58.87.87.159
upgslb.cdncloud.org.    3523    IN      A       111.231.194.62
upgslb.cdncloud.org.    3523    IN      A       123.132.254.175
upgslb.cdncloud.org.    3523    IN      A       139.199.17.218

;; Query time: 11 msec
;; SERVER: 100.100.2.138#53(100.100.2.138)
;; WHEN: Wed Aug 30 20:47:47 CST 2017
;; MSG SIZE  rcvd: 463