Sign in at 70: Marry the Beautiful Capitalist Daughter at the Beginning

[Capitalist eldest lady + single female protagonist + doting wife + rejuvenating the country through science and technology] Traveling through the 1970s, the fiancée broke off the engagement in public at the beginning because she disliked the poor and preferred the rich! I pointed back at the beautiful young lady Su Wanqing who was fainting from hunger beside the field: "I will marry you!" Doting on your wife = becoming stronger, strengthening the country = invincible! Bite! The host has completed a major life event and officially married Su Wanqing, the heroine of Destiny! [Reward: A high-end "Butterfly Brand" sewing machine! At first, I thought it was just a doting wife's golden finger. Until I handed over a [Drawing for Improvement of Simple Agricultural Tools] to the commune... [Ding! It is detected that the host's behavior is beneficial to the national economy and people's livelihood, triggering the national fortune sign-in task! [Reward: Controllable nuclear fusion technology (entry version)! I'm stupid, I just want my wife to live a good life, why don't you just give me nuclear fusion? No, system, do you have any misunderstanding about "good days"? ! From then on, the style of painting completely deviated! Solve the meat ticket problem for my wife → Reward [Super Hybrid Rice Technology]! Stand up for your wife to fight off Hong Kong businessmen → Reward [Future Financial Information Database]! When the father-in-law returns, he wants to use his wealth to take over his daughter... But I found that the big boss behind the scenes who supported him suddenly stood at attention when he saw me: "Chen Guoshi!" When Yingjiang's aircraft carrier fleet comes in force... I looked at the [Seventh Generation Fighter Engine Drawing] in the system panel that I had just signed in and fell into deep thought. (Sigh) I really just want to be a doting wife!