The steps are as follows:

1. Open the Hema App and find the relevant activity page or product page.

2. Browse the event or product page and look for options for giving away spring onions.

3. In the option of giving away shallots, there will be clear prompts or instructions, such as "You can get free shallots when you purchase this product" or "Click here to receive shallots."

4. Follow the prompts or instructions, such as purchasing related products or receiving spring onions.

5. After successfully receiving, you can view and track the received gifts in "My Orders" or "My Gifts" in the App.