I have seen the news. It's not my suspicion. I have been there. That's what they wrote on the construction-info board. I took the pic.Firstly I must correct you, you suspect that open field is the launch pad, not it is.
Secondely, I highly doubt that the 3000sqm in the table refers to the open field next to the factory. Would you launch your rocket next to your factory building? Most people won't. And other people won't allow it.
BTW, when I said the launch pad is out in the sea, I was quoting local news report <钱江晚报> whose reporter acquired this infor during the opening ceremony of the program.
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I also feel absurd when I saw the construction map. but it's true.