Facing the "Zone 3 Century Mission" initiated by JE22, the challenger must complete 100 kilometers within three hours, with the even stricter condition that the heart rate must be strictly controlled not to exceed 150 bpm throughout the ride. This test completely overturns the usual logic of all-out time trialing; the rider must constantly restrain pedaling output in front of the bike computer data, maintaining a high average speed for cruising while being wary of slight undulations, headwinds, or sudden heart rate spikes when starting from traffic lights. Throughout, the rider must precisely hover near the heart rate red line, with every acceleration accompanied by immense psychological pressure. Under harsh conditions lacking favorable timing and terrain, what kind of challenge will this nearly impossible pace-and-heart-rate control mission bring?