(10 points) WeChat is a popular social networking application in China. Red envelope is an application in WeChat which can be used to send "lucky money" to friends. As estimated in 2017, a total of 14.2 billion red envelopes were exchanged via WeChat on New Year's Eve alone, peaking at midnight with 760,000 transactions per second. It usually takes seconds for WeChat to process each transaction. For such high-volume concurrent transaction requests, what remediations could be used on the server side to ensure each request is served promptly?

Answer in details the last time I posted I was given wrong answer;