Come home with me to sell drill bits and find Chinese Academy of Sciences. Which episode is it?

It is 1 1 set to sell drill bits to Chinese Academy of Sciences in Come Home with Me. In the episode 1 1 of "Come Home with Me", Men Jiazhu gave the impression that he was ignorant at first, but he successfully obtained the patent of the drill. In order to prove himself, he wanted to sell the patent to the French, but his father, sister and brother all opposed it. Finally, he gave the technology to the Chinese Academy of Sciences.