1, GDP is not GDP? What is the consciousness of saving GDP and consuming GDP? Or does GDP include savings? Can savings also generate GDP?

Increase savings as a percentage of GDP. Savings can't produce GDP, only production can.

2. Does this mean putting money in the bank and coming to Qian Shengqian with interest?

Part of it is this, and the other part refers to the growth of virtual capital such as stocks and futures, but it does not produce GDP in essence.

3. The increase of capital stock means the increase of capital. Money is money. How can more money improve productivity and make GDP grow faster?

With the increase of capital stock (the increase of productivity is generally caused by the progress of science and technology and the increase of human capital investment), abundant funds will trigger more investment and make GDP grow faster.

This is a process of more money-investment-expanded reproduction.

This is my understanding. I don't know if my explanation suits you.