It's great to hear about Xielifeng Tech's expertise in CNC Machining aluminum parts and their long-standing experience as a cnc machining parts manufacturer in China in China. This experience likely means that they have developed the skills and capabilities necessary to provide high-quality services in this field.

When considering a company for cnc aluminum service, it's important to keep a few key factors in mind:

1. Quality: Ensure that the company has a reputation for delivering high-quality machined parts. You may want to inquire about the quality control processes they have in place.

2. Precision: CNC machining requires a high level of precision. Verify that the company has the equipment and expertise to meet your specific tolerances and specifications.

3. Materials: Xielifeng Tech appears to specialize in aluminum, but it's important to confirm that they can work with the specific materials you need for your project.

4. Experience: Their 23 years of experience is a positive sign, but it's always a good idea to ask for examples of previous projects similar to yours.

5. Capacity: Check if they have the production capacity to handle your order within your required timeframe.

6. Communication: Good communication is key in any manufacturing project. Make sure they are responsive and can understand your project requirements.

7. Pricing: Request a quote to ensure their pricing aligns with your budget.

You may also want to look for customer reviews or testimonials to gauge the satisfaction of past clients. Visiting their facility or arranging a video call to discuss your project in detail can also help build trust and confidence in their capabilities.

Overall, Xielifeng Tech's extensive experience in CNC machining aluminum parts suggests they have the knowledge and skills to deliver your project successfully, but it's important to conduct your due diligence and ensure they meet your specific requirements and quality standards.