I am a Sri Lankan Passport holder living in Sydney, Australia on permanent resident visa.

I am invited to visit China on business visa for one week to participate in a training.

Since I do not hold an Australian Passport, I was asked to provide a ‘Visa Notification Letter’ form the Chinese government office.

The Chinese company which is inviting me has already applied for that letter and it seemed to take longer than expected.
The upcoming Chinese holidays are also delaying the letter.

My training is planned to be held 2nd week of October.
Could you please let me know whether there’s any possibility of getting the business visa from Sri Lanka without providing the notification letter (since I am a Sri Lankan passport holder)?