user: ### NOW ANSWER:
Question: Which is the earliest year that had mixed doubles for Wang Wei Lu Ying?
Columns: ['Year', "Boys' Singles", "Girls' Singles", "Boys' Doubles", "Girls' Doubles", 'Mixed Doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2013.0, 'Heo Kwang-hee', 'Akane Yamaguchi', 'Li Junhui Liu Yuchen', 'Chae Yoo-jung Kim Ji-won', 'Huang Kaixiang Chen Qingchen']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Mixed Doubles" = 'Wang Wei Lu Ying';