Why is social security in Shengli Oilfield not displayed in China Merchants Bank?

Need to check with the social security bureau. China Merchants Bank's social security card can only be inquired in financial accounts, while the social security of Shengli Oilfield needs to be inquired by the local social security bureau, but China Merchants Bank does not. The social security of Shengli Oilfield has been incorporated into the national social security system and social order, so that the vast number of employees in the oilfield can enjoy higher level and more secure social security services.