China is following a strict zero-covid policy. It is the world's last program of its sort, due in part to the country's poor vaccination coverage and an effort to safeguard the elders.
Some experts have stated that the Chinese authorities have not yet resorted to violence to crack down on anti-Covid protests because it involves not just Tibetans, but Han Chinese migrant workers too.
Though we'd like to assume the CM of West Bengal sincerely wishes to assist her people in overcoming the looming Covid-19 threat, she may have closed the stable door after the horse bolted