Hair growth liquid

The hair growth liquid is prepared from the following components in parts by weight: 8 to 12 parts of cacumen biotae, 2 to 4 parts of fructus ligustri lucidi, 1 to 3 parts of ligusticum sinense oliver, 1 to 3 parts of tribulus terrestris, 6 to 12 parts of radix polygoni multiflori, 1 to 3 parts of holy basil, 1 to 3 parts of fructus gleditsiae, 2 to 4 parts of pomegranate seeds, 2 to 4 parts of radix rehmanniae, 1 to 3 parts of semen astragali complanati, 1 to 3 parts of radix rehmanniae preparata, 1 to 3 parts of herba ecliptae, 6 to 12 parts of radix rubiae, 6 to 12 parts of rhizoma drynariae, 4 to 6 parts of fructus psoraleae, 1 to 2 parts of ginger powder, 3 to 5 parts of iron powder and 1 to 3 parts of three black powder. The preparation method comprises the following steps: grinding 1-3 parts of radix angelicae, 1-3 parts of peach kernel and 1-2 parts of gibberellic acid into powder, soaking the powder in alcohol with the purity of 90%-95% for 12-16 days, filtering residues, and uniformly mixing the fil