This is something called conspiracy theory.

Any foreign investment may help the destination country to develop and keep the talent pool one way or another. UK does not need the Chinese expertise to develop its own nuclear powered submarine. It is the British government, business and residents pay the total cost in the form of subsides and electricity bill. The government wants an anchor investor to redevelop its Northern Corridor. Of course, it does not want to fund with tax payer money directly. This is a pure commercial deal.

On the other hand, the Chinese company does have the rare opportunity to showcase its advanced G3 (3rd generation) nuclear power technology. It is equivalent to get endorsement from British government. The potential opportunities in the high quality market is enormous. It helps Chinese to rebrand itself as technology innovator and high quality industrial powerhouse, rather than a cheap and low end consumer products manufacturer. 

Therefore, Britain receives the key investment for it Northern Corridor redevelopment efforts. French company locked in a long term revenue stream. Chinese company also get in a rare high quality investment, and received key endorsement from major industrialized country for its G3 technology, which may translate to opportunity in high quality market (it has already happened). That is a win-win deal. No secret about it. Don't be panic.

这就是所谓的阴谋论。

任何外国投资可以帮助目的地国家发展和保留人才拉上。英国不需要专业知识中国发展自己的核动力潜艇。这是英国政府，企业和居民支付补贴和电费的形式的总成本。政府希望锚投资者重建其北部走廊。当然，它并不希望直接使用纳税人的钱资助。这是一个纯粹的商业交易。

在另一方面，中国公司确实有难得的机会，展示其先进的G3（第三代）核电技术。这相当于从英国政府得到认可。在高品质的市场潜在的机会是巨大的。它有助于中国把自己作为更名的技术创新和高品质的工业强国，而不是廉价和低端消费类产品制造商。

因此，英国获得了它北部走廊重建工作的重点投资。法国公司锁定在一个长期的收入流。中国公司也获得了难得的高质量的投资，并获得了关键的支持来自主要工业化国家对其G3技术，这可能转化为高品质的市场机会（它已经发生）。这是一个双赢的交易。它不是什么秘密。不要恐慌。