@Liuxinyu970226 that's not really the intent of Cognate.

@Lea_Lacroix_WMDE thoughts?

I agree with @Addshore. Cognate is linking words between different Wiktionaries but not between Wiktionary and Wikipedia.

So will Wiktionary be able to add interproject links via Wikidata?

@Liuxinyu970226 as an interim solution, you could use :

Template:Wiktionary
&
Template:Wikipedia

to link the projects together. I have tried it for zhwiki "灌水" and zhwiktionary "灌水" and appears to work with a slight edit as the Wikipedia page title does not exactly match.

Wiktionary deals with words while Wikipedia deals with things (see w:WP:NOTDICT and wt:WT:WFW); pages with the same title in the main namespaces on these two projects shouldn't be connected via Cognate or Wikidata.
It's not good to link, for example:

• wikt:zh:飘 (a Han character and a verb) to wp:zh:飘 (a novel),
• wikt:zh:裂痕 (a common noun) to wp:zh:裂痕 (a movie), or
• wikt:zh:壮志凌霄 (an idiom) to wp:zh:壮志凌霄 (a song).

The three WP articles describe specific works of art, but titles of works are unlikely included in Wiktionary.
Please manually place interwiki templates instead.