Chang jeng cheng (James Chang) is a talented sports and fitness equipment designer and company leader. GRI company was founded by him and he has devoted his life to it.... He spends all his free time, even during airplane transportation , are constantly enriching their professional knowledge, and thinking about how to innovate and improve the equipments that have been produced, and strive to connect design and production into the most efficient combination. Anyone who knows him can feel his passion for fitness equipment design , as well as his generosity and kindness to others .
The following are some of the design manuscripts he left behind…..
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