It somewhat depends on how practical you want your jetpack to be.

For a classic, sci-fi style, bare-minimum jetpack with no automation/navigation/communication what-so-ever, 50kg dry and 150kg fueled can indeed get you off the moon. (to 1600m/s according to this rocket calculator, assuming isp=320s).

Quite promising, until...

if you want to get to your target lunar orbit with some level of precision and certainty, i.e. not just "off the moon" but actually to somewhere, then the weight of extra hardware can go easily past what a person could carry, even with reduced gravity.

I came to this conclusion based on the most lunar sample-return mission, Chang'e-5.

Chang'e-5 ascent stage reached 1.6km/s in 6min using a 3000N main engine, with a liftoff mass of 560kg and in-orbit mass of 300-400kg(with quite a bit of leftover fuel, dry mass is probably 280kg, targeting a maximum delta v of 2200m/s just like Apollo).

Adding 100kg of an astronaut to this vehicle you need a 70kg more fuel to get to the same velocity (from 560kg-330kg-1600m/s to 730-430-1660, assuming isp=320). That's just too bulky and heavy for a person to carry as a "pack".

(I will not any references here because finding reliable and accurate data for a Chinese spacecraft is almost impossible. You are welcome to improve upon my very rough estimate, e.g. maybe study Soviet lunar-sample-return missions.)

It somewhat depends on how practical you want your jetpack to be.

For a classic, sci-fi style, bare-minimum jetpack with no automation/navigation/communication what-so-ever, 50kg dry and 150kg fueled can indeed get you off the Moon (and reach the velocity of 1600$\frac{\text{m}}{\text{s}}$, according to this rocket calculator, assuming I_sp=320s).

Quite promising, until...

if you want to get to your target lunar orbit with some level of precision and certainty, i.e. not just "off the Moon" but actually to somewhere, then the weight of extra hardware can go easily past what a person could carry, even with reduced gravity.

I came to this conclusion based on the most lunar sample-return mission, Chang'e-5.

Chang'e-5 ascent stage reached 1.6$\frac{\text{km}}{\text{s}}$ in 6min using a 3000N main engine, with a liftoff mass of 560kg and in-orbit mass of 300-400kg  (with quite a bit of leftover fuel, dry mass is probably 280kg, targeting a maximum $\Delta v$ of 2200$\frac{\text{m}}{\text{s}}$ just like Apollo).

Adding 100kg of an astronaut to this vehicle you need a 70kg more fuel to get to the same velocity (from 560kg-330kg-1600$\frac{\text{m}}{\text{s}}$ to 730-430-1660, assuming I_sp=320s). That's just too bulky and heavy for a person to carry as a "pack".

(I will not any references here because finding reliable and accurate data for a Chinese spacecraft is almost impossible. You are welcome to improve upon my very rough estimate, e.g. maybe study Soviet lunar-sample-return missions.)