Samsung, Xiaomi and OPPO are among a growing number of businesses announcing a shut-down of their plants in India in order to comply with this country's COVID-19-related lockdown measures. Meanwhile, Vivo has reportedly asked their R&D personnel in the same country to work at home thus far.
https://www.notebookcheck.net/Samsung-OPPO-Vivo-and-Xiaomi-suspend-work-on-their-devices-at-their-Indian-facilities.458849.0.html