BEIJING, April 6 (Reuters) – Among the French business executives travelling to Beijing with President Emmanuel Macron, the mood was cautiously sanguine on the thawing post-pandemic trade prospects with China, with some rejecting American-led calls for 'decoupling'. Macron travelled to China with a 50-strong delegation of business leaders including the CEOs of Airbus (AIR.PA), Alstom (ALSO.PA) and EDF (EDF.PA), raising eyebrows among some diplomats that this could blur the message of firmness the West wants to send at a time of heightened tension between Beijing and the United States. In the French embassy's gardens, where Macron addressed the French community…