Little Qiang's thoughts

When Xiu Mei felt the cold temperature of the glass window against her slightly cold palm, Xiu Mei immediately realized the change in season. If her memory serves her right, it was still a hot and rainy season when she was kidnapped. It was already mid-August by then. Even if she slept for a whole week, it was completely impossible for the climate to suddenly change into winter in one week. 

Even if her emotions and thoughts were in turmoil, Xiu Mei was still quite rational. 

Her hands and wrists that visibly slimmed down.

The colder temperature outside. 

All these points are pointing to only one possibility. 

That is she had been out far longer than she thought she was. If it was already winter… then it must be already approaching November or maybe it was already November. Her room was devoid of anything that could indicate date and time except for the television if she turns it on.