* State planner's move to discourage stake or asset transfers to foreign investors * State media says deal could harm industrial security* Says Manus' move to Singapore biggest point of contention * Meta conducted only a few weeks of due diligence on Manus, ?sources saidBy Kane Wu, Laurie Chen and Eduardo Baptista BEIJING/HONG KONG/SINGAPORE, April 28 (Reuters) – C hina's blocking of Meta's acquisition of AI startup Manus will heighten ?the risk for global investors looking to invest in advanced tech firms with ties to the country ?amid ?Beijing's expansion of jurisdictional reach to safeguard strategic assets.The National Development and…