Mechanical Engineer with Mandarin Skills

US brand founder in production talks with two Chinese factories on a propane cooking appliance. I need an engineer to join 2–4 Zoom calls with factory engineering teams and translate technical discussion accurately in both directions. I'll lead the calls and ask the questions — your job is making sure nothing gets lost or dumbed down between me and their engineers. Top 3 required skills: Fluent Mandarin (spoken), Fluent English, Mechanical engineering background — ideally sheet metal, gas appliances, or similar metal products manufacturing. Hourly, ~6–10 hours over 3–4 weeks. Calls happen during China business hours (early morning US Eastern) — state your time zone. Potential ongoing work through sampling and QC. In your proposal, tell me briefly: your engineering background and any hands-on experience with Chinese factories.