Add pork knuckles and simmer for 1 hour over low heat, remove and drain.

放入猪手，以慢火煮1小时，取起沥干。

youdao

Remove both ends from bean sprouts and blanch in boiling water for a minute. Then remove and drain well.

将豆芽头尾摘除，放入沸水中汆烫一下，取出沥干水分备用。

youdao

Rinse cucumber well and shred, then soak in cold water with a little sugar added for 3 minutes. Remove and drain well.

小黄瓜洗净，切丝，加少许糖放入冷开水浸3分钟，去除涩味后取出沥干。

youdao

Fry the doughnuts until golden then remove with a slotted spoon and drain on the paper towels.

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Soak them in a sink full of cold water, swish them around to loosen any dirt, remove with a slotted spoon, and drain well in a colander.

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Transfer to paper towels to drain and cool, then remove the casings and crumble the meat.

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