How to merge individual Guangdong social security account and Guangzhou social security account?

It depends on which social security account you want to keep. If you keep your social security account in Guangdong, you can apply to Guangzhou Social Security Bureau for moving out of social security with your ID card and social security card, and apply to Guangdong Social Security Bureau for merging social security accounts with this payment voucher, which will not affect your accumulated payment period. If you keep your social security account in Guangzhou, you can apply to Guangdong Social Security Bureau for relocation.

Apply during normal working days from Monday to Friday.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.