C991 A psalm of mountainous stacks

"What are you thinking about? So lost in thought? " He crept up behind her, but she did not notice.

Hearing this, Wei Qing suddenly regained his senses.

"I'm thinking whether I should use wind or water."

"If you want to use water energy, you have to find a place where the current is fast." Xiao Qingqian gave his opinion.

Wei Qing frowned, thinking, "If that's the case