Package to China still in transit after a month?

I did some reading onlne and apparently somtimes the buyers atually DO get the packages, but since their county is lazy about actually scanning the labels, they use this as a way to get the item for free since it shows it was never delivered? Is this true?

So there ANY way of me finding out that it was delivered? I had a similar thing happen in Thailand a while back. Advice?

USPS delivery to China is slow compaired to China Post to the US.
I also believe that Chinese buyers are using the lack of tracking to get freebies.

Paypal surprisingly sided in my favor a few days ago. There was no proof of delivery, only the copy of my online label slip and no more tracking after it left Los Angeles.

I currently have another Chinese buyer claiming that the item wasn't received and is trying to pressure me into a refund. Let's see what happenens. This and the previous item had a value of over $250.

I've had nothing but positive experiences with Chinese buyers but I have temporarily blocked China due to the sudden pileup of these INR cases.