If you have a good entry and exit record in the past, and there is no overstaying or bad record in your country, you can directly fill in the need for multiple trips when signing a visa for any Schengen country next time. According to different countries, the application fee is different, such as France, which has the same price for many times and once. The materials prepared for multiple applications are basically the same as those prepared at one time. If you have relatives there or proof of business dealings, it is easy to sign, which is your normal requirement.
In your visa materials, prepare more proof of China's property and previous business dealings, and you will have a better chance to sign. I only put an extra piece of A4 paper in France, which was very short: My sister is pregnant and I hope to have dinner with her. In fact, I only applied for an application form of 1 month, and the visa officer gave me multiple round trips a year without saying anything.
Let me tell you another rule that most people don't know. For example, if you signed multiple round trips:
Your visa is: stay time limit 180 days.
The validity period (entry and exit time limit) is from a certain day to a certain day, such as 365 days. Then, if your stay in these 365 days is less than 180 days, you can go directly to the consulate and ask for an extension to the next year without having to apply for a visa again.
This rule has existed for a long time, but too few people do it, so it is not commonly used. I think this rule can save you a lot of trouble if you travel a lot.