Can I send a laptop without the battery through China Post to Canada?

Last year I was living in China and I had a laptop sent from Australia to myself in China. Because of Covid19 there has been a long delay in getting the laptop to it's destination. The laptop was released from customs yesterday and delivered, but I am no longer in China. I have already returned to Australia. Can I use China post now to send that laptop back to me in Australia?

Hi,
I want to send a small electronic writing board to Japan via China post air mail, but when I went to China post near my home, the employee refused because it was electronic equipment.
But its not really electronic one like cell phone or laptop and it has just small round battery like in the watch.
It is just kind of toy for children.
Also on Aliexpress(alibaba), their sellers sell and send this goods through China Post Air mail.
Their one of sellers told me if I remove the battery inside, I can send it through China post.
But I'm not sure if its true or not, so....
Can you confirm if it is sure? You have to make it clear and answer.

If I can send without battery, can you write sentences in Chinese that I can send this item ?
I want to show your sentences to China post employee near my home because I cant speak Chinese well and also they can't speak English.

Please reply me ASAP.