BEIJING — China has not held back in forcing the pace of the search for Malaysia Airlines Flight 370. It has deployed 21 satellites and a flotilla of naval ships. It has dispatched investigators to Malaysia, run background checks on the Chinese passengers, and scoured radar images of its vast western regions. Every day it has cajoled, chided and criticized Malaysian officials.

And still it has come up empty-handed. Two weeks after the plane vanished on an overnight flight to Beijing, no trace of the Boeing 777 jet or the 239 people on board, two-thirds of whom are Chinese, has been found.

The painful process of working with Malaysia in searching for the airplane and investigating what went wrong in the early hours of March 8 has revealed the limits of China’s power, influence and technological and military might in the region, despite its rapid rise as a rival to the United States and American strategic dominance of the Western Pacific.

Within China, anguished relatives and friends of the passengers and their many sympathizers are pressing hard for answers, but the government finds itself helpless as Malaysia takes the lead in the search and investigation efforts, which is consistent with international norms on air disasters.