According to the Constitution of China * * * Youth League, the restrictive conditions for members to join the League are as follows: in China 14 years old and under 28 years old, those who have not held positions in the League are counted as the masses.

Extended data:

After graduating from college, you should handle the letter of introduction and transfer-out procedures of league organization relations in the office of learning league organization in time. If you don't go through the formalities, the employment unit can't transfer the group relationship after graduation, and you can't pay the tour fee. If you don't pay the tour fee for a long time, it will be counted as automatic withdrawal.

The letter of introduction of the Communist Youth League is a letter used to prove the relationship between the Communist Youth League organizations. When entering a higher school or changing jobs, you must have a letter of introduction from the original league organization to prove the identity of the league organization, in addition to transferring the league organization relationship to the original unit (that is, the identity of the league organization, including the application form and the volunteer letter), as a certificate to receive your league organization relationship. It shall be issued by the committee above the grass-roots committee of the Communist Youth League and stamped with the official seal. The Communist Youth League branch committee is not qualified to send.

References:

Letter of introduction from the Communist Youth League-Baidu Encyclopedia