http://track-chinapost.com/result_china.php?order_no=LZ170452115CN shows only result "Order Information Received". Your seller applied this tracking number from china post but never actually ship anything to you. You are very likely to be scammed.

if you paid with paypal/aliexpress/WISH/AMAZON, you need open dispute immediately against fraud and claim refund.

The box "current location" says NULL because the package hasn't been sent to the freight company (so there is no location to put in the box), you have must likely been scammed and you should immediately file a chargeback with your credit card company or bank

Tracking for the new number shows that an order for shipping has been created, but the post company has not received the package from Expressed Paw.

Why did they send you a new tracking number? Hopefully, it is because they intend to send a package... but if you do not see an update within a week you are getting scammed and should file chargeback with your credit card company or bank

Hi, I am sorry to say that it is extremely likely that you have been scammed.

First, they send you a tracking number which shows that no package has been sent in to China Post company. Next, when you complain about it, they for some reason send you a new one. As of today, the second tracking number also does not show any update. Lastly, the company is "called asendia" now - it is a common practice for scam companies to change their company names from time to time to avoid authorities and bad reviews.

You must talk to paypal or your bank or your credit card company to get your money back as soon as possible