How long does it take to extend a petroleum internship before being transferred to a full-time job?

Extension of petroleum internship for 6 months before becoming a full-time employee. After checking the recruitment announcement of Yanchang Petroleum Group, it can be seen that after the recruitment candidates are confirmed, employees within the system will first go through the secondment procedures for a probation period of 6 months, and the probation period for employees hired outside the system will be no less than 6 months. Those who pass the assessment at the end of the probation period will have their probation terminated (formally transferred to the employing department). Those who fail the assessment will be returned to their original work unit or their labor contract will be terminated.