"Qiaoqiansan" is the abbreviation of Chinese Pinyin, and it is difficult to accurately explain its meaning without providing specific contextual information. I can only try to give some possible explanations here:

1. Homonym of "bridge money": In some areas, "bridge money" may refer to a kind of charge, that is, people need to pay a certain fee to cross the bridge. In this case, "3,000 yuan crossing the bridge" may mean paying 3,000 yuan (RMB) to cross the bridge.

2. The homonym of "bridge loan": "bridge loan" refers to a short-term loan, which is usually used to make up the gap between the borrower's long-term financing and short-term financing. In this case, "crossing the bridge for 3,000 yuan" may refer to bridge loan.

3. Network terms or abbreviations: In some online communities or chat scenes, "Bridge 3" may be an expression in a specific context, but the specific meaning needs to be judged according to the context.

Please provide more contextual information to explain "Bridge 3" more accurately.