The bought mulberries were soaked in clear water for 30 minutes, washed twice and drained with a plastic sieve.

Large pieces of rock sugar are broken.

Prepare a bottle sterilized by boiling water, put on disposable gloves, grab a handful of mulberries and crush them in the bottle (you can crush them without crushing them), with a layer of mulberries and a layer of sugar until they are filled with 12 kg of mulberries, and a bottle of 20 kg is just one bottle. I covered the bottle with a fresh-keeping bag and sealed it with a lid.

10 days later, open the lid and stir. Cover and continue to seal 10 day and filter with gauze.