Share the news to friends and circles of friends with wechat scanning QR code < / P > < p > on April 27. On Monday afternoon, local time, the crew of the "AX-1" mission splashed down in the Atlantic Ocean near the Florida coast of the United States aboard SpaceX's "Endeavour" manned dragon spacecraft. In 39 hours, SpaceX will launch the "freedom" manned dragon spacecraft to send three NASA astronauts and one European Space Agency astronaut to the international space station < p > < / P > < p > on Monday, four private astronauts successfully returned to earth, announcing the successful end of the 17 day private space mission "AX-1". NASA commercial manned project manager Steve stich said that NASA and SpaceX engineers have been "studying data" to study the performance of the manned dragon spacecraft when re entering the atmosphere < p > on Tuesday morning, stich said at a press conference: "in general, the flight was very smooth and there were really no major problems." "The team has looked at a lot of data, and they have the opportunity to check everything. They have checked the thermal protection system and studied a lot of flight data. Obviously, the parachute deployment is also clean, and all the main parachutes are opened almost at the same time without any delay. Everything is fine." < p > NASA officials showed enough confidence in SpaceX's manned dragon spacecraft and began planning to launch the "freedom" manned dragon spacecraft from the Kennedy Space Center in the early morning of Wednesday Eastern time. The crew-4 mission will send NASA astronauts Kjell Lindgren, Bob Hines and Jessica Watkins and European Space Agency astronaut Samantha cristoforetti to the international space station. So far, the weather conditions at the launch site and the launch suspension area are good < p > five days after the successful docking of the "freedom" manned dragon spacecraft with the international space station, the crew of the crew-3 mission to the international space station last November will begin to return to earth. The five-day handover will ensure that NASA astronauts can continue to work smoothly on the international space station The return of four crew members of the crew-3 mission will mark SpaceX's completion of six manned space missions in less than two years. "It's really amazing because all this was done during the epidemic," Jessica Jensen, SpaceX's vice president for customer operations and integration, said Tuesday morning < p > SpaceX now has four manned dragon spacecraft, namely endeavour, tenacity, endurance and freedom. Company executives said that at present, SpaceX does not intend to build a manned dragon spacecraft. On Monday, Benji reed, director of the company's manned space program, said SpaceX could currently support up to six manned space missions a year < p > Jason said SpaceX would continue to send astronauts into space safely. "I just want to reiterate that security remains and will always be the most important," she said (Chen Chen) < / P > < p >