Probably means that they did a pre-authorization. Which means that the merchant verifies that your account is valid and that sufficient funds are available to cover the transaction's cost.
The funds are deducted from your account and placed in a hold until the merchant ships the item(s) at which point they will be transferred to the merchant or the hold expires. That is generally a period of up to 3 days.
So while your computer may not be shipped yet, my guess is the hold means that it will ship tomorrow or Wednesday at the latest.
Thanks. The agent said that she will find out what is going on tonight. I guess she sent a message to China and is waiting for an update.