When 了 has the same verb before and after it, is it reduplication combined with 了1?
Quote from the &quot;Verb&quot; page of the Chinese Grammar Wiki:

Reduplication
In Chinese, verb reduplication is a common phenomenon. Reduplication indicates one or more of the following:

A short, quick action
An attempt
Something being light and relaxed

When reduplicating single character verbs such as 看, 一 can optionally be inserted between them e.g. 看一看. On the other hand, when you are reduplicating two character verbs, (e.g. 整理整理), 一 can't be inserted between them. The reduplicated part of the verb is always pronounced with a neutral tone. If the aspect particle 了 is used, it must be inserted between the reduplicated verbs, not afterwards, so it would be &quot;看了看&quot; not &quot;看看了.&quot;

Which shows that the structure is a reduplication of single character verb with aspectual le