Joining Echemi, the required professional backgrounds vary depending on the specific positions. Here are some examples:

1. International Trade Sales/Manager (Food Nutrition/Chemistry/Pharmaceuticals):
- Preferred background in Food Science and Engineering, Chemistry, or Pharmaceutical majors.

2. Purchasing Manager/Director:
- Bachelor's degree or above, with a preference for International Trade/International Business/Chemistry or related majors.

3. International Business Development (BD):
- Bachelor's degree or above, with a proficiency in English (CET-6 or equivalent), including strong listening, speaking, reading, and writing skills.

4. Market Analyst:
- Bachelor's degree or above, with 2+ years of experience in the information industry.

5. Human Resources Director:
- Bachelor's degree or above, with 10+ years of experience in human resources from well-known enterprises or consulting firms.

6. Overseas Business Development Assistant:
- Bachelor's degree or above, with a preference for majors in Chemistry or International Trade, and practical experience in foreign trade is preferred.

These job requirements indicate that Echemi prioritizes candidates with relevant professional backgrounds, especially those related to chemistry, international trade, food science, and pharmaceuticals. Additionally, there is a high demand for proficiency in English, especially for positions involving international communication such as International BD and Overseas Business Development Assistant.