I have no idea. It's possible that Big Rig is a character or a concept in BB Comics, or they could be completely unrelated. Need more context to figure it out.
Chapter 126, "The Production Team Actually Played Dirty on This?!", is the clearest early answer because it turns Brother Lu's situation into a concrete plot event. The chapter gives readers a real answer by opening on Wen Jiaojiao initially wanted to cause trouble.
Chapter 324, "Early Drills, Surge in Cold Resistance Level Members", is the clearest early answer because Cloud Dragon Army finally turns buildup into a real advancement. The setup is After Xia Chuan's two-month-long transformation, the outer city has..., but the pressure keeps building through The outer city of Great Xia is enclosed by three walls and the Double....
Chapter 300, "Perseverance, Beast Tide Breaks the Barrier (Part 4)", is the clearest early answer because it turns Xia Chuan's situation into a concrete plot event. A useful checkpoint is the way the scene starts with At your command!" Xia Chuan turned to sweep his gaze across the crowd... and follows through with Dragging it out is correct, this is only the second day, keep....
Chapter 330, "Longshan System Gathering, Simplified Sect System", is the clearest early answer because it turns Li Tiancheng's situation into a concrete plot event. It opens with Just as everyone in Xia City was preparing to welcome the Cold... and closes on Last night at Yangyuan Peak, upon learning Li Xuanling was pregnant,....
Chapter 327, "The Beast Tide Battle, the Wolf King and the Trump Card, White Dew Gu's Desperate Situation (4)", is the clearest early answer because the buildup finally cashes out in a real clash. Early on, Unveil the tarp, prepare the Divine Machine Crossbow!" Xia Hong's.... By the end, Fwoom… Fwoom… Ultimately, the bowstring couldn't withstand the force....
Chapter 345, "Luo Ming, Mirror Valley Defense Commander, Beast Tide, Great Xia's 6 Armies", is the clearest early answer because it turns Luo Ming's situation into a concrete plot event. Early on, Great Xia, Year Seven, September Ninth, the latter half of the night.... By the end, The Ice Tree takes advantage of its role as a staple, otherwise, the....
Chapter 319, "Military Merit and Bestowal of Titles, Hearts Stirred", is the clearest early answer because it turns Mu Dong's situation into a concrete plot event. A useful checkpoint is the way the scene starts with After Mu Dong finished explaining, he seemed to remember something... and follows through with Don't say I didn't warn you in advance." Realizing Xia Hong wasn't....
Chapter 301, "Long Mountain Marches In, Defying the Enemy to the Death", is the clearest early answer because the violence around Cold Resistance Level becomes final instead of hypothetical. It opens with Seeing the actions of the Xia Army, Li Xuanling was not only... and closes on Under the pressure of the massive number of Cold Resistance Level,....
Chapter 115, "Jiang Yan's New Follower—Richard!", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Yan was woken by a loud crowing noise.
Chapter 334, "Hanqiong's Seven Divisions, Moao Mountain, Hearing Beishuo Again", is the clearest early answer because it turns Hanqiong's situation into a concrete plot event. It opens with Year three of Great Xia, the sixth day of August, just after... and closes on Lu Yang never intended to compare with Long Mountain..