They will have dinner ub Sichuan Restaurant at 6.30 pm.对in Sichuan at 6.30pm 提问

问题描述:

They will have dinner ub Sichuan Restaurant at 6.30 pm.对in Sichuan at 6.30pm 提问

划线部分是 地点与时间所以用 when and where 提问
When and where will they have dinner ?