hebangyu 发表于 2019-8-11 22:32把挑战邮件发出来看看
Hi Xiao,
Thank you for your inquiry regarding Tier Upgrade. We appreciate you taking the time to contact us.
We have processed your request and upgraded the tier to Diamond.
As always, thanks for traveling with us and please let us know if you have any other questions. You can reach us any time at HiltonHonors@hilton.com.