The alternative to two factions evolving into competing parties could be yet another purge of one of them?

What are Tuanpai?

Shiro was mostly right. The full name of the CCYL is Zhōngguó Gòngchǎnzhǔyì Qīngniántuán (中国共产主义青年团). Tuan is the last character and means faction.
The CCYL is abbreviated to Gòngqīngtuán (共青团) where Zhōngguó (China) is dropped, Gòng is the abbreviation for communist, qīng is the abbreviation for youth, and tuán = group.

Pài also forms the second half of the pair of characters that mean political party (Dang’pài), which is usually shortend to Dang.

Tuán’pài translated character at a time would be “group faction”, but its universally recognised as meaning the faction of The Party who made their career through the CCYL.

As for a purge of one or the other, anything is possible, but it seems both factions are very deep and well established. Much deeper than just the standing committee at any rate, so it would have to be a very large purge I would think. I doubt we’ll see an open two party system, but the main benefits of such a system (accountability, political rejuvenation, centrist tendency of policy) can be achieved in multiple ways.

The alternative to two factions evolving into competing parties could be yet another purge of one of them?

What are Tuanpai?