I Am Too Old to Build a Bridge

You are so old, why are you still doing time travel? After Jia Ping'an died, a new world suddenly came. Here there was Zhu Ning who always cried and called me brother, a doctor who was not very smart, Xue Yanwei who said he was my best friend, and a homeless man who wanted to be my son. The noisy daily life makes me tired every day, but also very happy. The world was divided, and only bridges could connect it. After the mysterious explosion, the bridge was lost. Some said it was hidden, while others said he became another person. The main male protagonist is Jia Ping'an, but because he is too old, he really can't fall in love, so let his younger brother do the sweet love! But our male protagonist is still loved by many people. Double-acting puppy Zhu Ning × likes to coax the puppy Xue Yanwei