user: Question: What Date has Opponents of Sun Shengnan Han Xinyun?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponents', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Winner', '26 September 2006', 'Jakarta , Indonesia', 'Hard', 'Varatchaya Wongteanchai', 'Lavinia Tananta Ayu Fani Damayanti', '6–2, 6–4']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponents" = 'Sun Shengnan Han Xinyun';