Malaysia on Wednesday joined India in protesting a new Chinese map that lays claim to India’s territory and Malaysia’s maritime areas near Borneo island ahead of next week’s Group of 20 summit in New Delhi.

This has exacerbated the tensions between China and India, which are embroiled in a three-year military standoff along their shared border.

The timing of the protest is key, as Chinese President Xi Jinping is expected to attend the summit.