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When creating goldfinch bonsai, the new piles that come out in the first year don't need pruning, and the extra branches can be pruned in the second year.
Prune the goldfinch bonsai before it blooms, and prune the branches that are not growing well and have died, so as to avoid the image of the bonsai being too dense.
In addition, after the goldfinch bonsai blooms, all the residual flowers should be trimmed in time, otherwise it will consume nutrients, and the branches that have already bloomed should also be trimmed.