Seed soaking: thoroughly wash the seeds with clear water and soak the seeds with clear water 12- 16 hours.

Bite a small mouth at the hilum to facilitate the absorption of water and the exposure of radicle (commonly known as bud) when the seed germinates. Note that no matter what measures are taken to bite a small mouth at the hilum, the seed kernel inside cannot be hurt.

Wrap the seeds with a clean wet towel and put them at about 30℃ to accelerate germination. After 2-3 days, the radicle can be exposed. Before germination, wash towels and seeds thoroughly with clear water every day to keep the seeds clean.

Germinated seeds can be sown. Because of the inconsistency of single seed germination, if possible, you can pick out the seeds that germinate first, wrap them in clean wet towels and store them in the refrigerator at low temperature, and sow them together after most of them germinate.