The government on Wednesday signed an agreement with China that will improve information sharing on auto safety following last summer’s recall of thousands of defective Chinese-made tires. The “memorandum of understanding” signed by the National Highway Traffic Safety Administration and China’s National Reform and Development Commission will “strengthen cooperation and communication” on several motor vehicle regulation and safety issues. In June, NHTSA ordered a U.S. importer, Foreign Tire Sales Inc., to recall as many as 450,000 tires it had bought from Hangzhou Zhongce Rubber Co. The Union, N.J.-based importer initially said it did not have the financial resources to conduct a full recall, but then announced in August that it would recall 255,000 tires.