Opening up a second sea of qi requires a huge amount of powerful mana, usually speaking, at least one grandmaster-level master must be fully assisted, and the weaker the cultivation, the longer it will take.

In addition, a person's energy is limited, and if he practices two exercises at the same time, it is easy to work hard but not achieve success, and the effort is not proportional to the benefit, so very few people are willing to try.

At this moment, Mu Haotian was worried because he couldn't squander his mana, which can really be described as a happy trouble, and he was afraid that he would die of anger if he said it

"Cultivating Immortals: Starting from a Heart" Chapter 275 [Advancing by Leaps and Bounds] is hitting in the hand, please wait for a while,

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