A university student is raking in nearly $90,000 a year by shipping baby formula home to western China.

Chinese national Molder Sayrao, who moved to Australia to study at Macquarie University, began sending the product back home after her family and friends started asked for it when she arrived in 2014.

But Ms Sayrao's side business quickly spread by word-of-mouth and she now also ships vitamins, skincare creams and baby formula, The Daily Telegraph reports.

The 31-year-old now has more than 1500 regular customers and sends nearly 1000 parcels to China each week. She makes a profit of $1700 a week or nearly $90,000 a year.

“I have a full-time job as well,” she said.

Chinese national Molder Sayrao has been shipping Australian goods such as baby formula to China. (Facebook)

“I used to work in retail selling skincare at Myer, and also for luxury brand Givenchy. Daigou is like an extra job I can finish on the weekend, if I have a day off I just go to the store.”

Ms Sayrao is just one of an estimated 80,000 daigou, or personal shoppers, that currently buy and ship product from Australia to China.

But the controversial practice of shipping baby formula overseas has sparked anger among Australian consumers.

Supermarket shelves are often stripped of formula minutes after opening each morning, with customers sprinting through the stores to get their hands on the product.

Supermarket shelves are often stripped of baby formula minutes after opening each morning, with customers sprinting through the stores to get their hands on the product.

It has sparked crazy scenes and left some new mothers having to hunt for the formula at different stores.

Some supermarkets, pharmacies and chemists have now put in place measures to prevent the theft and bulk-buying of baby formula.