C192 The Marquis Use the Smoke of a Fire Beacon

"Wow, big sister Li Yan, you're so smart," Wang Yao said as she looked at Li Yan with admiration.

"Little sister, you're also very smart." Li Yan rubbed Wang Yao's nose and said.

"How are you smart? I'm so stupid. But big sister Li Yan, the sea bird can send out the letter. Although the letter is very fast, but how can it send a letter?" Wang Yao frowned and said.

"I don't know about that