Invest in R&D at your own expense.

The developed products are still useless, so they can only buy and hoard them themselves, so as not to make relevant scientific researchers slack......

Of course, Yang Zhen knows these difficulties.

But with Huang Lingyi, I don't know how much I can persist in spending money like this...

"Back to the Flying Era: Starting from the Gold Rush Nest" Chapter 475 The shopkeeper bullies? I am hitting it in my hand, please wait a moment,

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