Is Ying Long the master of 12 constellation?

No, Ying Long is an ancient Gemini monster.

12 constellation's ancient beasts are: 1, and Aries's ancient beast is called: Yazi; 2. The ancient beast of Taurus is called Xuanwu; 3. The ancient beast of Gemini was named: Ying Long; 4. The ancient beast of Cancer was named: gluttony; 5. Leo's ancient beast was named: White Tiger; 6. Virgo's ancient beast name: nine-tailed fox; 7. The ancient beast of Libra is called Bai Ze; 8. Scorpio's ancient beast is called Kirin; 9. The ancient beast of Sagittarius is called Qinglong; 10, Capricorn: the prison cow is named after the ancient beast; 1 1, the ancient beast of Aquarius is called Suzaku; 12, the ancient beast of Pisces is called: nine-color deer.