Secondly. Zheng Doyan himself often do strength exercise. That is, lifting dumbbells. Practice equipment.
My personal advice. You buy a pair of dumbbells. Then practice every day to practice 20 minutes dumbbells. The time according to your own decrease or increase.
Then choose a day with the same exercise with dumbbells after the training.
Strength and Zheng Doyan's exercises combined. This is fun and effective.
This is the first time I've ever done this.