Can Beijing only pay social security and not provident fund?

You can't. You can't just pay social security and not provident fund in Beijing. According to the Social Insurance Law of People's Republic of China (PRC), the employing unit shall handle the social insurance registration for employees within 30 days from the date of employment. Housing provident fund should also be paid. As long as the unit pays social security, the provident fund is also a mandatory item.