How does the only child of pr in Australia let his parents immigrate?

There are two kinds of visas for Australian open-parent immigrants, one is free parent immigration (subclass 103) and the other is paid parent immigration (subclass 143). Specifically, there are elderly parents who immigrate below, and there will be many in Google.

Now I am going to apply for parents' immigration (about 5W Australian dollars per person), because I think the waiting time for free is too long (at least 10 years, the official said it will take 30 years). What is more troublesome is that parents have to prepare multiple documents in China (such as their passports, birth certificates, marriage certificates, and our one-child certificate). We just need to help fill out the form here and provide financial guarantee.

If you want to help your parents apply for immigration in the near future, we can communicate! ~ I asked the agency, and one of their applicants charges about 1500. . So I want to save it. . . .