http://track-chinapost.com/result_china.php?order_no=RP754891640CN shows the parcel was sent to airline on Oct 20.

China Post will lost control of the parcel after sent to airline. so there will be no update anymore after sent to airline date.

Sent to airline does not mean you will get the parcel very soon. It will keep waiting 5 to 10 days in airline warehouse waiting flight space and another 1 to 4 weeks import customs processing in destination country(speed depending on country). The status will stuck at "sent to airline" during this 2 to 8 weeks period.

Once it passes import customs clearance, Indonesia Post will scan and update its new location for China Post database and you will see new status.

If your buyer protection is expiring, open dispute for refund. Otherwise keep waiting.

Quote from kurniiaade on October 26, 2019, 16:38
Why is it taking so long? Is there a lot of shipping?

Here is the answer:

I can fly to China in 24 hours! Why does a package take weeks?

http://track-chinapost.com/result_china.php?order_no=RP769562764CN shows No shipping record. This means your seller never actually shipped anything yet. you might be scammed.

if you just got this number, You should push seller to ship the goods immediately. Tell him if you can not track real shipment data in next 3 days, you will open dispute to aliexpress/amazon/ebay/paypal against fraud.

I don't trust such excuse.