Can the social security bought by Shenzhen Shajing be transferred back to Longhua Social Security Bureau's hometown?

Of course. Social insurance transfer process:

After the insured establishes the basic old-age insurance relationship in the new employment place and pays the fee, the employer or the insured submits a written application for the transfer and continuation of the basic old-age insurance relationship to the social security agency in the new insurance place;

The social security agency of the newly insured place will review the application for transfer and continuation within 15 working days, send a consent letter to the social security agency where the insured person's original basic old-age insurance relationship is located, and provide relevant information; Do not meet the transfer conditions, make a written explanation to the applicant or the insured;

The social security agency where the original basic old-age insurance relationship is located shall handle all the transfer and connection procedures within 15 working days after receiving the acceptance letter;

After the new insurance agency receives the basic old-age insurance relationship and funds transferred by the social security agency where the insured person's original basic old-age insurance relationship is located, it shall complete the relevant procedures within 15 working days, and notify the employer or the insured person of the confirmation in time;

There is a gap in the cumulative calculation of the payment period of endowment insurance, which can be supplemented or not.