Do China women still use veil when they go to Oman?

No need. According to relevant public information, there is no law in Oman stipulating what clothes men and women must wear, nor does it stipulate that China women must wear yarn when going to Oman. Sultanate of Oman is a country located in the southwest of Asia and the southeast coast of Arabian Peninsula. It borders the United Arab Emirates in the northwest, Saudi Arabia in the west and Yemen in the southwest, guarding the the Strait of Hormuz in the Persian Gulf, the most important oil export channel in the world.