Why should India talk to China after Galwan?

It has been confirmed by the MEA and recent US Intelligence reports that more than 350 Chinese soldiers armed with iron rods and spiked bats were waiting to pounce on a small party of 50 unarmed Indians. It is a different story that the Indian soldiers despite their inferior numbers managed to overpower them and in the process killed 43 Chinese soldiers and injured 76 of them at the cost of 20 Indian soldiers including the CO 16 Bihar Col Babu. Still, we are talking to Chinese. why?