I Deliver Food to History

I downloaded an APP that allows me to order takeout for historical figures. Xiang Yu drank lemon tea, Zhuge Liang got the Suxiao Jiuxin Pill, and Yue Fei used tissues at Fengbo Pavilion. Each intervention consumes a memory. Forgot the WiFi password. I forgot my home address. My mother's voice was forgotten. Until one day, a titanium alloy heart valve was unearthed at the archaeological site. There are two words written in the column of patent inventor: To be determined. The registrant is my dad. He died three years ago.