China, on Tuesday, strongly objected to India's scrapping to Article 370 and reorganise J&K saying that it undermined its sovereignty. 

Source: Rediff

According to the Times of India, India then asked China to mind its own business. 

When asked about India's decision to turn Ladakh into a Union Territory, a region where both countries share a disputed border, foreign ministry spokesperson Hua Chunying accused India of 

continuing to undermine Beijing’s 'territorial sovereignty by unilaterally changing its domestic law'.

Source: The Hindu

This statement received a quick response from MEA spokesperson, Raveesh Kumar, who said: 

India does not comment on the internal affairs of other countries and similarly expects other countries to do likewise.
Source: The Hindu

Kumar said that the Kashmir Reorganisation Bill, 2019, passed by the parliament on Tuesday was an internal matter concerning the territory of India.