There is, of course, a great deal of individual variability in what I’ve written regarding tolerance for casual dating based on region, the sensibilities of the girl’s parents (that is, how the girl was raised), and, no less so, the girl’s age. A 30-year old unattached Chinese woman is going to be dealing with a remarkable degree of pressure from her family, friends, and coworkers to find a husband. Obviously, this will not hold true for a girl in her early 20s.
Even in China, there is a fine line between talking over a casual cup of tea and serious dating but, unfortunately, that line doesn’t extend to weeks of dating unless the girl is just looking for casual sex (and while this is not a common scenario, it would be possible to find such a girl in Shanghai for a young Scandinavian guy).
When you wrote “I am (naturally) not contemplating marriage at this point,” did you mean with this particular girl (as you don’t know her yet) or with anyone? If you are open to marriage with the right girl at this time, then that’s fine. However, if you are just looking for a casual relationship “with benefits,” then you just need to be perfectly honest about your intentions.
Finally, don’t be afraid to talk directly with the girl as the best method for ascertaining her particular sensibilities and reactions in regard to “a few weekend lunches.” If she agrees to have lunch with you the first time, then (during lunch) simply inform her of what you have in mind, i.e., you invited her out in order that the two of you would have the chance to get to know each other better. Then see how she reacts. If she smiles and indicates she is comfortable with this arrangement, so be it. If, on the other hand, she says something like “Oh, thank you for choosing me, I think you are wonderful too. I can’t wait to tell my mother. When would you like to meet my parents?” (this actually happened to me my first year in China) then a few casual weekend lunches with no strings attached are probably out of the question.
