Chinese visa on different passport

I applied to visa to China and received it on 29Aug2019. it is valid for a year with multiple entries. However, my passport was lost in mail, and I reported it as lost. I applied to a new passport and got it. Meantime, my passport with vsa was found. Now I have a valid passport with no visa and invalid passport with a valid visa. Should Iapply ot get a new visa or carry two passports? thank you