I have paid social security in Weifang for 12 years, in May 2010 in Beijing's new company to pay the insurance, but not the transfer of Weifang's to Beijing, how to do it

The social security in Weifang will not be voided.

After you pay in Beijing, do not pay at the same time in Weifang, because at the same time to pay for retirement will be wasted at the same time to participate in a period of time.

Now in Beijing, just start paying social security again, the previous does not affect.

Because you have been insured in Weifang for more than ten years, you can retire in Weifang later. When you go back to Weifang, just transfer the social security of Beijing to Weifang.