The 2 clubs Landik is a convention used by the responder after his Partner opened in a minor and the second-seat player overcalled 1NT.
By bidding 2 clubs the responder promises:
- - a major two-suiter at least 5-4
- - maximum 8HCP. With more than 8HCP he would have doubled.
South is using the Landik convention. He doesn't promise anything in clubs!