from 30 April 1986, the Lanzhou Military Region began to take over the Yunnan Front Command, assuming the task of defensive operations in Laoshan.

The 47th Army Group Commander Qian Shugen selected the 604th position and the 968th high ground as the main targets during the combat meeting.

The choice of this area as the target for the first strike had the significance of dampening the morale of the PAVN and maintaining military pressure, while also allowing for initial battle practice on more familiar terrain.

To improve the PLA's defensive posture, the 47th Army Group's military headquarters resolved to take the 139th Division's 416th Regiment's 5 companies (5 companies of special merit) to strengthen the 6 companies' 3 platoons, the regiment's reconnaissance platoon, the regiment's engineer company's ground-burst platoon, and the division's ground-burst company's 2 platoons, with the support and cooperation of the artillery, electronic countermeasures section (detachment), and feint detachment, relying on forward positions, choose a favorable time to take a combination of frontal attacks and flank penetration, small formations, multiple waves, and The tactical means of continuous attack, fighting and suppressing at the same time, quick and total annihilation, captured the 604th position and 968th high ground, completely annihilated the defending enemy, destroyed the fortifications, waited for the opportunity to capture prisoners, collected the spoils of war and withdrew as ordered.

At the same time, the Barrier Breakers moved forward quickly under cover of artillery fire and opened up passages in minefields and obstacles with rocket blasters.

The order ......" was drowned out by the jamming; 13:22: the enemy 168th Artillery Brigade 1st Battalion cursed at the gun watch: "...... you sent the report, why can't I hear ...... fuck, China put jamming, ......" The PLA infantry first assault team quickly attacked, rushing through the minefield via the passageway straight to the 604th position.

At the same time, two combat teams occupied the southeast side of the 968th high ground with favorable terrain, forming an internal and external front to monitor the PAVN.

The remnants of the PAVN on the heights were hiding in shelters and cantonment holes and resisting, and there were also some remaining dark fire points that suddenly resurrected.

Coupled with the fact that the PAVN artillery fire in the deep areas kept hitting the two heights incessantly, the search and destroy battle was brutal and the commandos suffered a lot of casualties.

At position 604, commandos Gu Jinhai and Bi Dongyu were searching ahead when a grenade was suddenly thrown from a very concealed cantonment hole nearby.

In the nick of time, Gu Jinhai quickly pushed Bi Dongyu to the ground, while he himself was wounded in five places, including his head, chest and right arm.

Other commandos hurriedly bandaged Gu Jinhai's wounds and prepared to send him down to the position, but he resolutely refused and continued to fight.

After receiving the battle report, the command ordered the two assault teams to retreat immediately after destroying the PAVN fortifications on the positions.

After blowing up the Vietnamese caves, shelters and other fortifications in their positions, the First and Second Commandos began to retreat with the captured weapons and supplies, as well as the wounded, prisoners and the remains of martyrs.

The command immediately organised seven artillery companies to carry out a surprise fire attack on the PAVN in the assembly area at 2230–45 hours, killing and wounding one of them before they retreated.

In this operation, the PLA mobilized 56 artillery batteries with a total of 336 assorted guns to support the attack of a reinforced company, which was considered by some reports as "finally fighting a broad battle".

After the war, the Electronic Countermeasures Radar Division of the Lanzhou Military Region Communications Department concluded in the battle case that.

The first thing you need to do is to take advantage of the power of electronic countermeasures by jamming groups to form the overall strike capability.

To give full play to the effectiveness of electronic countermeasures, the battalion for the enemy's combat formation, position formation and command (observation) system and battlefield terrain conditions and other factors, taking into account the number of our electronic countermeasures, performance, communications, and service security capabilities and the survival conditions of the people anon factors, take the combination of small and large, far and near, front and side, high and low, ultra-short wave and short wave combination of methods, appropriate

This time, I jammed troops against the enemy to take a variety of electronic defense measures, to take a "sound east to west", "static braking", "close to the system close to" and other tactical means, to achieve The enemy's electronic defensive measures The enemy's 818th Infantry Regiment, which was interfered with by my feint, panicked and misrepresented the battle; the enemy's 168th Artillery Brigade, 457th Artillery Regiment, and 150th Artillery Regiment, which were interfered with by my focus, had difficulty in giving firing orders in time and basically did not pose a threat to our army's mountain attack operations.A film crew led by Wang Hong, a field photographer, followed the assault team throughout the battle, taking photographs and video from so close that Wang Hong himself was shot and wounded.